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<a href="session__server__impl_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow-IPC: Sessions</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &quot;<a class="code" href="detail_2session__fwd_8hpp.html">ipc/session/detail/session_fwd.hpp</a>&quot;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="preprocessor">#include &quot;<a class="code" href="server__session__dtl_8hpp.html">ipc/session/detail/server_session_dtl.hpp</a>&quot;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="preprocessor">#include &quot;<a class="code" href="ipc__session_2src_2ipc_2session_2error_8hpp.html">ipc/session/error.hpp</a>&quot;</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="preprocessor">#include &quot;<a class="code" href="app_8hpp.html">ipc/session/app.hpp</a>&quot;</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="preprocessor">#include &quot;<a class="code" href="native__socket__stream__acceptor_8hpp.html">ipc/transport/native_socket_stream_acceptor.hpp</a>&quot;</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="preprocessor">#include &quot;<a class="code" href="blob__stream__mq_8hpp.html">ipc/transport/blob_stream_mq.hpp</a>&quot;</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="preprocessor">#include &quot;<a class="code" href="ipc__core_2src_2ipc_2transport_2error_8hpp.html">ipc/transport/error.hpp</a>&quot;</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span><span class="preprocessor">#include &quot;<a class="code" href="util_8hpp.html">ipc/util/detail/util.hpp</a>&quot;</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="preprocessor">#include &lt;boost/interprocess/sync/named_mutex.hpp&gt;</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="preprocessor">#include &lt;boost/interprocess/sync/scoped_lock.hpp&gt;</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="preprocessor">#include &lt;boost/move/make_unique.hpp&gt;</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceipc_1_1session.html">ipc::session</a></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>{</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="comment">// Types.</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="comment"></span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="comment">/**</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="comment"> * Internal class template comprising API/logic common to every Session_server variant, meant to be</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="comment"> * `private`ly sub-classed and largely forwarded.  In particular the vanilla Session_server</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="comment"> * (see its short Implementation doc header section) sub-classes us and makes no use of the available</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="comment"> * customization points.  Contrast with, e.g., shm::classic::Session_server which uses customization</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="comment"> * points for shm::classic SHM-arena setup.</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="comment"> *</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><span class="comment"> * The available customization points are as follows.</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span><span class="comment"> *   - Per-session: `*this` is parameterized on #Server_session_obj.  The vanilla value is `Server_session&lt;...&gt;`;</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="comment"> *     but to add capabilities sub-class Server_session_impl as explained in its doc header and proceed from</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="comment"> *     there.  For example see shm::classic::Server_session.  Server_session_impl has its own customization point(s).</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="comment"> *     - No-customization = specify #Server_session here.</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="comment"> *   - Cross-session: Additional per-Client_app setup (such as setting up cross-session SHM arena(s) in</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment"> *     on-demand fashion) can be specified by passing in `per_app_setup_func` to ctor.</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="comment"> *     - No-customization = specify do-nothing function here that returns `Error_code()` always.</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="comment"> *   - Cross-session: Certain custom code can be caused to run as the last thing in the Server_session_impl dtor,</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span><span class="comment"> *     even after all its state has been destroyed (e.g., all threads have been stopped/joined).</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span><span class="comment"> *     A sub-class may use this customization point by calling sub_class_set_deinit_func().  If not called, the</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="comment"> *     customization point is unused by default.</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span><span class="comment"> *</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span><span class="comment"> * ### Implementation design ###</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span><span class="comment"> * Generally the impl should be reasonably easy to follow by reading the method bodies, at least if one understands</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span><span class="comment"> * the general ipc::session client-server paradigm.</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span><span class="comment"> *</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="comment"> * The thing to understand strategically, as usual, is the thread design.  This is an acceptor, so one might</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="comment"> * have expected it to be implemented similarly to, say, Native_socket_stream_acceptor -- maintaining a thread W</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="comment"> * in which to do some/most work; including maintaining a &quot;deficit&quot; queue of oustanding async_accept() requests</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="comment"> * and a &quot;surplus&quot; queue of ready `Server_session`s to emit.  This was an option, but I (ygoldfel) felt that</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="comment"> * piggy-backing handling of events directly onto the unspecified handler-invoking threads of the internally</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span><span class="comment"> * used objects would produce a much simpler data structure and state machine.  (As a side effect, the behavior</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="comment"> * described in &quot;FIFO&quot; section above occurs.  Also as a side effect, the error-emission behavior described</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="comment"> * in &quot;Error handling&quot; above occurs.  Basically: each async_accept()&#39;s internal handling is independent of the</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="comment"> * others.  They share (almost) no state; there is no single async-chain and explicit queues unlike in various other</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span><span class="comment"> * boost.asio-like classes in ::ipc.  Each async_accept() triggers async op 1, the handler for which triggers async</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span><span class="comment"> * op 2, the handler for which emits the result to user.  This is</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span><span class="comment"> * simpler to implement, but it also results in sensible API contract behavior, I feel.)</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span><span class="comment"> *</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span><span class="comment"> * Here is how it works.</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span><span class="comment"> *</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span><span class="comment"> * For each potential `Server_session` -- i.e., for each async_accept() -- there are 2 steps that must occur</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="comment"> * asynchronously before one is ready to emit to the user-supplied handler:</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span><span class="comment"> *   - Our stored Native_socket_stream_acceptor, where we invoke</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span><span class="comment"> *     transport::Native_socket_stream_acceptor::async_accept(), must emit a PEER-state (connected)</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span><span class="comment"> *     transport::sync_io::Native_socket_stream (the opposing peer object living inside the opposing Client_session).</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span><span class="comment"> *     - Now a Server_session_dtl may be constructed (not yet emitted to user) and then</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span><span class="comment"> *       Server_session_dtl::async_accept_log_in() is invoked.</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span><span class="comment"> *     - Or if the socket-accept failed, then we can emit that to the user already; done.</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><span class="comment"> *   - That Server_session_dtl::async_accept_log_in() must complete the async log-in exchange against the</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span><span class="comment"> *     opposing Client_session.</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span><span class="comment"> *     - Now the Server_session_dtl can be converted via pointer `static_cast&lt;&gt;` to `Server_session` and</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span><span class="comment"> *       emitted to the user.</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span><span class="comment"> *     - Or if the log-in fails at some state, then we can emit that to the user.</span></div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span><span class="comment"> *</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span><span class="comment"> * Nomenclature: We call the `N_s_s_a::async_accept()` handler-invoking thread: Wa.  It is officially an</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span><span class="comment"> * unspecified thread or threads, but, by contract, handlers are executed non-concurrently, so it can be</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span><span class="comment"> * considered one thread (and actually it is as of this writing).  We call the</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span><span class="comment"> * Server_session::async_accept_log_in() handler-invoking thread: Ws.  This is really a separate thread for</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span><span class="comment"> * each `Server_session`, so in fact 2 different async-accept requests can cause 2 handlers to invoke simultaneously.</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span><span class="comment"> *</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span><span class="comment"> * So each time one calls async_accept() from thread U (i.e., user thread(s) from which they must never invoke</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span><span class="comment"> * mutating stuff concurrently), that kicks off transport::Native_socket_stream_acceptor::async_accept(),</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span><span class="comment"> * which fires handler in thread Wa; we then kick off `Server_session::async_accept_log_in()`, which fires</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span><span class="comment"> * handler in thread Ws, where we finalize the `Server_session` and emit it to user.  There is no cross-posting</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a5fc42e333522f7b1ed11fbff4ae72e5c">  101</a></span><span class="comment"> * to some other worker thread W (but read on).</span></div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span><span class="comment"> *</span></div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span><span class="comment"> * The obvious question is, do the handlers, some of which (as noted) may run concurrently to each other</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span><span class="comment"> * (request 1&#39;s Ws handler can co-execute with request 2&#39;s Wa handler; and request 2&#39;s Wa handler can co-execute</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span><span class="comment"> * with request 3&#39;s Wa handler), mess each other over by mutatingly accessing common data?  Let&#39;s consider the</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span><span class="comment"> * state involved.</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span><span class="comment"> *</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span><span class="comment"> * For each async-accept request, the amassed data are independent from any other&#39;s; they are passed around</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span><span class="comment"> * throughout the 2 async ops per request via lambda captures.  There is, however, one caveat to this:</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span><span class="comment"> * Suppose `S-&gt;accept_log_in(F)` is invoked on not-yet-ready (incomplete) `Server_session* S`; suppose F is invoked</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span><span class="comment"> * with a truthy #Error_code (it failed).  We are now sitting in thread Ws: and S should be destroyed.</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span><span class="comment"> * But invoking dtor of S from within S&#39;s own handler is documented to be not-okay and results in</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span><span class="comment"> * a deadlock/infinite dtor execution, or if the system can detect it, at best an abort due to a thread trying to</span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span><span class="comment"> * join itself.  So:</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span><span class="comment"> *   - We maintain State::m_incomplete_sessions storing each such outstanding S.  If dtor runs, then all S will be</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span><span class="comment"> *     auto-destroyed which will automatically invoke the user handler with operation-aborted.</span></div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span><span class="comment"> *   - If an incomplete (oustanding) S successfully completes log-in, we remove it from</span></div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span><span class="comment"> *     Session_server_impl::m_incomplete_sessions and emit it to user via handler.</span></div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span><span class="comment"> *   - If it completes log-in with failure, we remove it from State::m_incomplete_sessions and then:</span></div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span><span class="comment"> *     - hand it off to a mostly-idle separate thread, State::m_incomplete_session_graveyard, which can run S&#39;s dtor</span></div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span><span class="comment"> *       in peace without deadlocking anyone.  (If `*this` dtor runs before then, the S dtors will still run, as each</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span><span class="comment"> *       queued lambda&#39;s captures are destroyed.)</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span><span class="comment"> *       - This is the part that avoids the deadlock.  The other things above are orthogonally needed for the promised</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span><span class="comment"> *         boost.asio-like semantics, where handler must run exactly once eventually, from dtor at the latest.</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span><span class="comment"> *</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span><span class="comment"> * However note that State::m_incomplete_sessions is added-to in thread Wa but removed-from in various threads Ws.</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span><span class="comment"> * Therefore it is protected by a mutex; simple enough.</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span><span class="comment"> *</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span><span class="comment"> * @todo Session_server, probably in ctor or similar, should -- for safety -- enforce the accuracy</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span><span class="comment"> * of Server_app attributes including App::m_exec_path, App::m_user_id, App::m_group_id.  As of this writing</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span><span class="comment"> * it enforces these things about each *opposing* Client_app and process -- so for sanity it can/should do so</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span><span class="comment"> * about itself, before the sessions can begin.</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span><span class="comment"> *</span></div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span><span class="comment"> * @tparam Server_session_t</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span><span class="comment"> *         See #Server_session_obj.  Its API must exactly equal (or be a superset of) that of vanilla #Server_session.</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span><span class="comment"> *         (Its impl may perform extra steps; for example `async_accept_log_in()` might set up a per-session SHM</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span><span class="comment"> *         arena.)</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span><span class="comment"> * @tparam Session_server_t</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span><span class="comment"> *         The class that is in fact `private`ly sub-classing us.</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span><span class="comment"> *         This is necessary for this_session_srv().  See its doc header for discussion.</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span><span class="comment"> */</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Session_server_t, <span class="keyword">typename</span> Server_session_t&gt;</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html">  143</a></span><span class="keyword">class </span><a class="code hl_class" href="classipc_1_1session_1_1Session__server__impl.html">Session_server_impl</a> :</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>  <span class="keyword">public</span> flow::log::Log_context,</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>  <span class="keyword">private</span> boost::noncopyable</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>{</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>  <span class="comment">// Types.</span></div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span><span class="comment"></span> </div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span><span class="comment">  /// See this_session_srv().</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a47625f247dea35cf276d31c039c6bf0c">  151</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a47625f247dea35cf276d31c039c6bf0c">Session_server_obj</a> = Session_server_t;</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span><span class="comment"></span> </div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span><span class="comment">  /// Useful short-hand for the concrete `Server_session` type emitted by async_accept().</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a0009247dd98ec58b22040d1c65bb5a54">  154</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_class" href="classServer__session__t.html">Server_session_obj</a> = <a class="code hl_class" href="classServer__session__t.html">Server_session_t</a>;</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span><span class="comment"></span> </div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span><span class="comment">  /// Short-hand for Session_mv::Mdt_reader_ptr.</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a86de1d5b7cae35d89827c3235e2b8d89">  157</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a86de1d5b7cae35d89827c3235e2b8d89">Mdt_reader_ptr</a> = <span class="keyword">typename</span> Server_session_obj::Mdt_reader_ptr;</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span><span class="comment"></span> </div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span><span class="comment">  /// Short-hand for Session_mv::Channels.</span></div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a9ad5c6cbb1c9378d42ec5cd909389dc2">  160</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a9ad5c6cbb1c9378d42ec5cd909389dc2">Channels</a> = <span class="keyword">typename</span> Server_session_obj::Channels;</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>  <span class="comment">// Constructors/destructor.</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span><span class="comment"></span> </div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span><span class="comment">   * See Session_server ctor; it does that.  In addition:</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span><span class="comment">   *</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span><span class="comment">   * takes and memorizes a functor that takes a Client_app const ref that identifies the app that wants to</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span><span class="comment">   * open the session, performs unspecified synchronous steps, and returns an #Error_code indicating success or</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span><span class="comment">   * reason for failure which dooms that async_accept().</span></div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span><span class="comment">   *</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span><span class="comment">   * ### Rationale for `per_app_setup_func` ###</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="comment">   * It is not intended for per-session setup.  #Server_session_dtl_obj should take care of that where it makes</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span><span class="comment">   * sense -- it does after all represent the individual budding session peer.  However our sub-class</span></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span><span class="comment">   * (e.g., shm::classic::Session_server) may need to keep track of per-distinct-Client_app resources</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span><span class="comment">   * (e.g., the per-app-scope SHM arena) which must exist before the opposing Client_session-type object</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span><span class="comment">   * completes its setup (e.g., by opening the aforementioned per-Client_app/multi-instance-scope SHM arena).</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span><span class="comment">   * It can detect a new Client_app is logging-in and set that up in the nick of time.</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span><span class="comment">   *</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span><span class="comment">   * @tparam Per_app_setup_func</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span><span class="comment">   *         See above.  Signature: `Error_code F(const Client_app&amp;)`.</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span><span class="comment">   * @param logger_ptr</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span><span class="comment">   *        See Session_server ctor.</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span><span class="comment">   * @param srv_app_ref</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span><span class="comment">   *        See Session_server ctor.</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span><span class="comment">   * @param cli_app_master_set_ref</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span><span class="comment">   *        See Session_server ctor.</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span><span class="comment">   * @param err_code</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span><span class="comment">   *        See Session_server ctor.  Additional #Error_code generated:</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span><span class="comment">   *        see `per_app_setup_func`.</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span><span class="comment">   * @param per_app_setup_func</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span><span class="comment">   *        See above.</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span><span class="comment">   * @param this_session_srv_arg</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span><span class="comment">   *        The object that is, in fact, `private`ly sub-classing `*this` (and calling this ctor).</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span><span class="comment">   *        See this_session_srv().  The value is only saved but not dereferenced inside the ctor.</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span><span class="comment">   */</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Per_app_setup_func&gt;</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a9bf4d5502b41c98a98fee4cc3c2f2530">  197</a></span>  <span class="keyword">explicit</span> <a class="code hl_function" href="classipc_1_1session_1_1Session__server__impl.html#a9bf4d5502b41c98a98fee4cc3c2f2530">Session_server_impl</a>(flow::log::Logger* logger_ptr,</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>                               <a class="code hl_class" href="classipc_1_1session_1_1Session__server.html">Session_server_obj</a>* this_session_srv_arg,</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>                               <span class="keyword">const</span> <a class="code hl_struct" href="structipc_1_1session_1_1Server__app.html">Server_app</a>&amp; srv_app_ref,</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>                               <span class="keyword">const</span> <a class="code hl_typedef" href="structipc_1_1session_1_1Client__app.html#add718cbf6aa1d2abb26fbadcc974a7bd">Client_app::Master_set</a>&amp; cli_app_master_set_ref,</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>                               <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code, Per_app_setup_func&amp;&amp; per_app_setup_func);</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span><span class="comment"></span> </div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span><span class="comment">  /// See Session_server dtor.</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ae4388def520aad700a3fcdfc95b6f24e">  204</a></span><span class="comment"></span>  <a class="code hl_function" href="classipc_1_1session_1_1Session__server__impl.html#ae4388def520aad700a3fcdfc95b6f24e">~Session_server_impl</a>();</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span> </div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>  <span class="comment">// Methods.</span></div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span><span class="comment"></span> </div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span><span class="comment">   * See Session_server method.  In addition: invokes `per_app_setup_func()` (from ctor)</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span><span class="comment">   * once the connecting Client_app becomes known; if that returns truthy #Error_code then this method</span></div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span><span class="comment">   * emits that error.</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span><span class="comment">   *</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span><span class="comment">   * @tparam Task_err</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span><span class="comment">   *         See Session_server method.</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span><span class="comment">   * @tparam N_init_channels_by_srv_req_func</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span><span class="comment">   *         See Session_server method.</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span><span class="comment">   * @tparam Mdt_load_func</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span><span class="comment">   *         See Session_server method.</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span><span class="comment">   * @param target_session</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span><span class="comment">   *        See Session_server method.</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span><span class="comment">   * @param init_channels_by_srv_req</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span><span class="comment">   *        See Session_server method.</span></div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span><span class="comment">   * @param mdt_from_cli_or_null</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span><span class="comment">   *        See Session_server method.</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span><span class="comment">   * @param init_channels_by_cli_req</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span><span class="comment">   *        See Session_server method.</span></div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span><span class="comment">   * @param n_init_channels_by_srv_req_func</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span><span class="comment">   *        See Session_server method.</span></div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span><span class="comment">   * @param mdt_load_func</span></div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span><span class="comment">   *        See Session_server method.</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span><span class="comment">   * @param on_done_func</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span><span class="comment">   *        See Session_server method.</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span><span class="comment">   */</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Task_err,</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>           <span class="keyword">typename</span> N_init_channels_by_srv_req_func, <span class="keyword">typename</span> Mdt_load_func&gt;</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a60ec88b23d73c354959a1e11636dc717">  236</a></span>  <span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1session_1_1Session__server__impl.html#a60ec88b23d73c354959a1e11636dc717">async_accept</a>(<a class="code hl_class" href="classipc_1_1session_1_1Server__session__mv.html">Server_session_obj</a>* target_session,</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>                    <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a9ad5c6cbb1c9378d42ec5cd909389dc2">Channels</a>* init_channels_by_srv_req,</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span>                    <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a86de1d5b7cae35d89827c3235e2b8d89">Mdt_reader_ptr</a>* mdt_from_cli_or_null,</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span>                    <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a9ad5c6cbb1c9378d42ec5cd909389dc2">Channels</a>* init_channels_by_cli_req,</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span>                    N_init_channels_by_srv_req_func&amp;&amp; n_init_channels_by_srv_req_func,</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>                    Mdt_load_func&amp;&amp; mdt_load_func,</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>                    Task_err&amp;&amp; on_done_func);</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span><span class="comment"></span> </div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span><span class="comment">   * See Server_session method.</span></div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span><span class="comment">   *</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span><span class="comment">   * @param os</span></div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span><span class="comment">   *        See Server_session method.</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span><span class="comment">   */</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a2a3c0c330d477176b714a9920196775d">  250</a></span>  <span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1session_1_1Session__server__impl.html#a2a3c0c330d477176b714a9920196775d">to_ostream</a>(std::ostream* os) <span class="keyword">const</span>;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span><span class="comment"></span> </div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span><span class="comment">   * Returns pointer to the object that is `private`ly sub-classing us.  In other words this equals</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span><span class="comment">   * `static_cast&lt;const Session_server_obj*&gt;(this)`, where this class is the base of #Session_server_obj,</span></div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span><span class="comment">   * but up-casting from a `private` base is not allowed.</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span><span class="comment">   *</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span><span class="comment">   * ### Rationale ###</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span><span class="comment">   * I (ygoldfel) acknowledge this is somewhat odd.  Why should a sub-class, per se, care or know about its</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span><span class="comment">   * super-class?  This at least vaguely indicates some sort of design mistake.  In fact this is needed, as of</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span><span class="comment">   * this writing, because shm::classic::Server_session_impl::async_accept_log_in() gets a Session_server_impl ptr,</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span><span class="comment">   * which it knows points to an object that&#39;s really the core of a shm::classic::Session_server, and it needs to</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span><span class="comment">   * interact with the SHM-classic-specific aspect of that guy&#39;s API.  So it calls this accessor here, essentially</span></div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span><span class="comment">   * as a way to up-cast from a `private` base (which is not allowed by C++).</span></div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span><span class="comment">   * Why can&#39;t it &quot;just&quot; take a `shm::classic::Session_server*` then?  Answer: because Session_server_impl uses, like,</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span><span class="comment">   * `virtual`-less polymorphism to invoke `async_accept_log_in()` regardless of which object it&#39;s calling it on....</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span><span class="comment">   * It&#39;s hard to summarize here in words in any way that&#39;ll make sense, but if one looks at the relevant code</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span><span class="comment">   * it makes sense.  Eventually.  Bottom line is, this way, it can just pass-in `this`, and then</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span><span class="comment">   * shm::classic::Server_session_impl::async_accept_log_in() can call this_session_srv() to get at the super-class</span></div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span><span class="comment">   * version of `this`.</span></div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span><span class="comment">   *</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span><span class="comment">   * I feel it is not criminal -- internal things are working together in a way that they logically intend to --</span></div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno">  272</span><span class="comment">   * but intuitively it feels like there&#39;s a smoother way to design it.  Probably.</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span><span class="comment">   *</span></div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span><span class="comment">   * @todo Reconsider the details of how classes in the non-`virtual` hierarchies</span></div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span><span class="comment">   * `Session_server`, `Server_session`, `Session_server_impl`, `Server_session_impl` cooperate internally,</span></div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span><span class="comment">   * as there is some funky stuff going on, particularly Session_server_impl::this_session_srv().</span></div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span><span class="comment">   *</span></div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span><span class="comment">   * @return See above.</span></div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span><span class="comment">   */</span></div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ad7cd4d77db826af9fe39c17e8ee7ca37">  280</a></span>  <a class="code hl_class" href="classipc_1_1session_1_1Session__server.html">Session_server_obj</a>* <a class="code hl_function" href="classipc_1_1session_1_1Session__server__impl.html#ad7cd4d77db826af9fe39c17e8ee7ca37">this_session_srv</a>();</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span> </div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span>  <span class="comment">// Data.</span></div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span><span class="comment"></span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span><span class="comment">  /// See Session_server public data member.</span></div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">  285</a></span><span class="comment"></span>  <span class="keyword">const</span> <a class="code hl_struct" href="structipc_1_1session_1_1Server__app.html">Server_app</a>&amp; <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>;</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span> </div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span><span class="keyword">protected</span>:</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span>  <span class="comment">// Methods.</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span><span class="comment"></span> </div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span><span class="comment">   * Utility for sub-classes: ensures that `task()` is invoked near the end of `*this` dtor&#39;s execution, after *all*</span></div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span><span class="comment">   * other (mutable) state has been destroyed, including stopping/joining any threads performing</span></div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span><span class="comment">   * async async_accept() ops.  It may be invoked at most once.</span></div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span><span class="comment">   *</span></div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span><span class="comment">   * The value it adds: A long story best told by specific example.  See the original use case which is</span></div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span><span class="comment">   * in shm::classic::Session_server; it sets up certain SHM cleanup steps to occur,</span></div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span><span class="comment">   * when the session-server is destroyed.</span></div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span><span class="comment">   *</span></div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span><span class="comment">   * ### Watch out! ###</span></div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span><span class="comment">   * At the time `task()` runs, the calling instance of the sub-class has been destroyed -- thus it is, e.g.,</span></div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span><span class="comment">   * usually wrong to capture your `this` in the `task` lambda, except for logging.</span></div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span><span class="comment">   * `get_logger()` and `get_log_component()` (which are in this super-class) are still okay to use.</span></div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span><span class="comment">   *</span></div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span><span class="comment">   * @tparam Task</span></div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span><span class="comment">   *         Function object invoked as `void` with no args.</span></div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span><span class="comment">   * @param task</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span><span class="comment">   *        `task()` shall execute before dtor returns.</span></div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span><span class="comment">   */</span></div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span>  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Task&gt;</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a40fca0b878f9150f5f7db55768da45ad">  310</a></span>  <span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1session_1_1Session__server__impl.html#a40fca0b878f9150f5f7db55768da45ad">sub_class_set_deinit_func</a>(<a class="code hl_typedef" href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">Task</a>&amp;&amp; task);</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span> </div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span>  <span class="comment">// Types.</span></div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span><span class="comment"></span> </div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span><span class="comment">   * Short-hand for concrete Server_session_dtl type, which each async_accept() creates internally, completes</span></div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span><span class="comment">   * the log-in process upon, and then up-casts to #Server_session_obj to emit to user via move-assignment.</span></div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span><span class="comment">   * #Server_session_dtl_obj is equal to #Server_session_obj -- it adds no data -- but exposes certain</span></div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno">  319</span><span class="comment">   * internally invoked APIs that the user shall not access.</span></div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span><span class="comment">   */</span></div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ae87dfd48a7e435800255722301d5bddc">  321</a></span>  <span class="keyword">using </span><a class="code hl_class" href="classipc_1_1session_1_1Server__session__dtl.html">Server_session_dtl_obj</a> = <a class="code hl_class" href="classipc_1_1session_1_1Server__session__dtl.html">Server_session_dtl&lt;Server_session_obj&gt;</a>;</div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span><span class="comment"></span> </div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span><span class="comment">   * Internally used ref-counted handle to a #Server_session_dtl_obj, suitable for capturing and passing around</span></div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span><span class="comment">   * lambdas.</span></div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span><span class="comment">   *</span></div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span><span class="comment">   * ### Rationale ###</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span><span class="comment">   * It is `shared_ptr`, not `unique_ptr`, for two reasons.  Primarily, it is so that it can be captured</span></div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span><span class="comment">   * via #Incomplete_session_observer to avoid a leak that would result from capturing #Incomplete_session</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span><span class="comment">   * in a lambda passed-to an async op on an #Incomplete_session *itself*.  `unique_ptr` cannot be observed</span></div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span><span class="comment">   * via `weak_ptr`; `shared_ptr` can.</span></div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span><span class="comment">   *</span></div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span><span class="comment">   * Secondarily, a `unique_ptr` cannot be captured in a lambda in the first place.</span></div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span><span class="comment">   */</span></div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a3a608ab714f6a6725e6122470d87713f">  335</a></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a3a608ab714f6a6725e6122470d87713f">Incomplete_session</a> = boost::shared_ptr&lt;Server_session_dtl_obj&gt;;</div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span><span class="comment"></span> </div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span><span class="comment">   * `weak_ptr` observer of an #Incomplete_session.  Capturing this, instead of #Incomplete_session itself,</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span><span class="comment">   * allows for the underlying #Incomplete_session to be destroyed while the lambda still exists.</span></div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span><span class="comment">   */</span></div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ae66f28a17f3cdd72d97212126483650a">  341</a></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#ae66f28a17f3cdd72d97212126483650a">Incomplete_session_observer</a> = boost::weak_ptr&lt;Server_session_dtl_obj&gt;;</div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span><span class="comment"></span> </div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span><span class="comment">  /// Short-hand for set of #Incomplete_session, with fast insertion and removal by key #Incomplete_session itself.</span></div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a5286c0f847ccf7e62d87c088e7be32e0">  344</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a5286c0f847ccf7e62d87c088e7be32e0">Incomplete_sessions</a> = boost::unordered_set&lt;Incomplete_session&gt;;</div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span><span class="comment"></span> </div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span><span class="comment">  /// Short-hand for State::m_mutex type.</span></div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ae7f35b32be309d354044662f0e17a891">  347</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#ae7f35b32be309d354044662f0e17a891">Mutex</a> = flow::util::Mutex_non_recursive;</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span><span class="comment"></span> </div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span><span class="comment">  /// Short-hand for #Mutex lock.</span></div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a5e864e857a767101ed964f532b06acd4">  350</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a5e864e857a767101ed964f532b06acd4">Lock_guard</a> = flow::util::Lock_guard&lt;Mutex&gt;;</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno">  351</span><span class="comment"></span> </div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno">  352</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno">  353</span><span class="comment">   * All internal mutable state of Session_server_impl.  It&#39;s grouped into this inner `struct`, so that we can</span></div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span><span class="comment">   * destroy it in the destructor via an `optional::reset()`, letting items be destroyed automatically in</span></div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno">  355</span><span class="comment">   * the opposite order in which they were constructed -- and *then* perform certain final steps when</span></div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno">  356</span><span class="comment">   * that state (including various threads running) is no longer a factor.  See Session_server_impl dtor</span></div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno">  357</span><span class="comment">   * and sub_class_set_deinit_func().</span></div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno">  358</span><span class="comment">   */</span></div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"><a class="line" href="structipc_1_1session_1_1Session__server__impl_1_1State.html">  359</a></span>  <span class="keyword">struct </span><a class="code hl_struct" href="structipc_1_1session_1_1Session__server__impl_1_1State.html">State</a></div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno">  360</span>  {<span class="comment"></span></div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno">  361</span><span class="comment">    /// The ID used in generating the last Server_session::cli_namespace(); so the next one = this plus 1.  0 initially.</span></div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"><a class="line" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a76d6d531e2bb8e82992a35959357b16d">  362</a></span><span class="comment"></span>    std::atomic&lt;uint64_t&gt; <a class="code hl_variable" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a76d6d531e2bb8e82992a35959357b16d">m_last_cli_namespace</a>;</div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno">  363</span><span class="comment"></span> </div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno">  364</span><span class="comment">    /**</span></div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno">  365</span><span class="comment">     * The set of all #Incomplete_session objects such that each one comes from a distinct async_accept() request</span></div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno">  366</span><span class="comment">     * that (1) has accepted a transport::sync_io::Native_socket_stream connection and thus created a</span></div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno">  367</span><span class="comment">     * #Server_session_dtl_obj but (2) whose Server_session_dtl::async_accept_log_in() has not yet completed (fired</span></div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno">  368</span><span class="comment">     * handler).</span></div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno">  369</span><span class="comment">     *</span></div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno">  370</span><span class="comment">     * Protected by #m_mutex; accessed from thread Wa and threads Ws.  See class doc header impl section for</span></div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno">  371</span><span class="comment">     * discussion of thread design.</span></div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno">  372</span><span class="comment">     *</span></div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno">  373</span><span class="comment">     * ### Impl design ###</span></div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno">  374</span><span class="comment">     * Once a Server_session_dtl is created by `*this`, we do `async_accept_log_in()` on it.  We cannot capture that</span></div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno">  375</span><span class="comment">     * Server_session_dtl itself into its handler&#39;s lambda, as that would create a cycle leak wherein</span></div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno">  376</span><span class="comment">     * the object can never be destroyed.  (This is typical when maintaining a boost.asio-style I/O object by</span></div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno">  377</span><span class="comment">     * a `shared_ptr` handle.)  So we capture an #Incomplete_session_observer (`weak_ptr`) thereof; but store</span></div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno">  378</span><span class="comment">     * the Server_session_dtl (a/k/a #Incomplete_session) here in `*this`, as of course it must be stored somewhere.</span></div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno">  379</span><span class="comment">     * Then if `*this` dtor is invoked before the aforementioned `async_accept_log_in()` handler fires, the handler</span></div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno">  380</span><span class="comment">     * shall fire with operation-aborted as desired.</span></div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno">  381</span><span class="comment">     *</span></div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno">  382</span><span class="comment">     * ### Ordering caveat ###</span></div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno">  383</span><span class="comment">     * As of this writing, since the dtor auto-destroys the various members as opposed to any manual ordering thereof:</span></div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno">  384</span><span class="comment">     * This must be declared before #m_master_sock_acceptor.  Then when dtor runs, first the latter&#39;s thread Wa</span></div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno">  385</span><span class="comment">     * shall be joined as it is destroyed first.  Then #m_incomplete_sessions shall be destroyed next.  Thus there</span></div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno">  386</span><span class="comment">     * is zero danger of concurrent access to #m_incomplete_sessions.  Obviously the dtor&#39;s auto-destruction</span></div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno">  387</span><span class="comment">     * of #m_incomplete_sessions is not protected by any lock.</span></div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno">  388</span><span class="comment">     *</span></div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno">  389</span><span class="comment">     * We could instead manually destroy stuff in the proper order.  I (ygoldfel) do like to just rely on</span></div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno">  390</span><span class="comment">     * auto-destruction (in order opposite to declaration/initialization) to keep things clean.</span></div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno">  391</span><span class="comment">     */</span></div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"><a class="line" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#ab6097ff11f1f8cca396ece86482861f4">  392</a></span>    <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a5286c0f847ccf7e62d87c088e7be32e0">Incomplete_sessions</a> <a class="code hl_variable" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#ab6097ff11f1f8cca396ece86482861f4">m_incomplete_sessions</a>;</div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno">  393</span><span class="comment"></span> </div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno">  394</span><span class="comment">    /// transport::Native_socket_stream acceptor avail throughout `*this` to accept init please-open-session requests.</span></div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"><a class="line" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a7d717bece2122ff619496717b5da7b68">  395</a></span><span class="comment"></span>    boost::movelib::unique_ptr&lt;transport::Native_socket_stream_acceptor&gt; <a class="code hl_variable" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a7d717bece2122ff619496717b5da7b68">m_master_sock_acceptor</a>;</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno">  396</span><span class="comment"></span> </div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno">  397</span><span class="comment">    /// Protects `m_incomplete_sessions`.  See class doc header impl section for discussion of thread design.</span></div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"><a class="line" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a96b5d124c1a31532a38a0f0cd095ec05">  398</a></span><span class="comment"></span>    <span class="keyword">mutable</span> <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#ae7f35b32be309d354044662f0e17a891">Mutex</a> <a class="code hl_variable" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a96b5d124c1a31532a38a0f0cd095ec05">m_mutex</a>;</div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno">  399</span><span class="comment"></span> </div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno">  400</span><span class="comment">    /**</span></div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno">  401</span><span class="comment">     * Mostly-idle thread that solely destroys objects removed from `m_incomplete_sessions` in the case where a</span></div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno">  402</span><span class="comment">     * Server_session_dtl::async_accept_log_in() failed as opposed to succeeded (in which case it is emitted to user).</span></div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno">  403</span><span class="comment">     */</span></div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"><a class="line" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#afea14f96bce70093ebf65d0f9b612b29">  404</a></span>    boost::movelib::unique_ptr&lt;flow::async::Single_thread_task_loop&gt; <a class="code hl_variable" href="structipc_1_1session_1_1Session__server__impl_1_1State.html#afea14f96bce70093ebf65d0f9b612b29">m_incomplete_session_graveyard</a>;</div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno">  405</span>  }; <span class="comment">// struct State</span></div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno">  406</span> </div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno">  407</span>  <span class="comment">// Data.</span></div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno">  408</span><span class="comment"></span> </div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno">  409</span><span class="comment">  /// See this_session_srv().</span></div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#aa7aed6de161203a2e7414411fa1defa5">  410</a></span><span class="comment"></span>  <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a47625f247dea35cf276d31c039c6bf0c">Session_server_obj</a>* <span class="keyword">const</span> <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#aa7aed6de161203a2e7414411fa1defa5">m_this_session_srv</a>;</div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno">  411</span><span class="comment"></span> </div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno">  412</span><span class="comment">  /// See ctor.</span></div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a798164cc2876cfaddf8793bd346d13f9">  413</a></span><span class="comment"></span>  <span class="keyword">const</span> <a class="code hl_typedef" href="structipc_1_1session_1_1Client__app.html#add718cbf6aa1d2abb26fbadcc974a7bd">Client_app::Master_set</a>&amp; <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a798164cc2876cfaddf8793bd346d13f9">m_cli_app_master_set_ref</a>;</div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno">  414</span><span class="comment"></span> </div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno">  415</span><span class="comment">  /// See ctor.</span></div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#adc97c8fd3c5860dc6164f0a384b9fe03">  416</a></span><span class="comment"></span>  <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc.html#aa455c7f045059736578ca275fc1a851f">Function</a>&lt;<a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> (<span class="keyword">const</span> <a class="code hl_struct" href="structipc_1_1session_1_1Client__app.html">Client_app</a>&amp; client_app)&gt; <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#adc97c8fd3c5860dc6164f0a384b9fe03">m_per_app_setup_func</a>;</div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno">  417</span><span class="comment"></span> </div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno">  418</span><span class="comment">  /// See State.</span></div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ac49be718ad86c3919563da57502d11b3">  419</a></span><span class="comment"></span>  std::optional&lt;State&gt; <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#ac49be718ad86c3919563da57502d11b3">m_state</a>;</div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno">  420</span><span class="comment"></span> </div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno">  421</span><span class="comment">  /// See sub_class_set_deinit_func().  `.empty()` unless that was called at least once.</span></div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a98165f48041d5a2846c7ac574833b933">  422</a></span><span class="comment"></span>  <a class="code hl_typedef" href="namespaceipc.html#aa455c7f045059736578ca275fc1a851f">Function</a>&lt;void ()&gt; <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a98165f48041d5a2846c7ac574833b933">m_deinit_func_or_empty</a>;</div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno">  423</span>}; <span class="comment">// class Session_server_impl</span></div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno">  424</span> </div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno">  425</span><span class="comment">// Free functions: in *_fwd.hpp.</span></div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno">  426</span> </div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno">  427</span><span class="comment">// Template implementations.</span></div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno">  428</span><span class="comment"></span> </div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno">  429</span><span class="comment">/// Internally used macro; public API users should disregard (same deal as in struc/channel.hpp).</span></div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"><a class="line" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">  430</a></span><span class="comment"></span><span class="preprocessor">#define TEMPLATE_SESSION_SERVER_IMPL \</span></div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno">  431</span><span class="preprocessor">  template&lt;typename Session_server_t, typename Server_session_t&gt;</span><span class="comment"></span></div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno">  432</span><span class="comment">/// Internally used macro; public API users should disregard (same deal as in struc/channel.hpp).</span></div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"><a class="line" href="session__server__impl_8hpp.html#afb6afd5f56bebcabd155f3c1def7f180">  433</a></span><span class="comment"></span><span class="preprocessor">#define CLASS_SESSION_SERVER_IMPL \</span></div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno">  434</span><span class="preprocessor">  Session_server_impl&lt;Session_server_t, Server_session_t&gt;</span></div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno">  435</span> </div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno">  436</span><a class="code hl_define" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno">  437</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Per_app_setup_func&gt;</div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a9bf4d5502b41c98a98fee4cc3c2f2530">  438</a></span>CLASS_SESSION_SERVER_IMPL::Session_server_impl</div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno">  439</span>  (flow::log::Logger* logger_ptr, <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a47625f247dea35cf276d31c039c6bf0c">Session_server_obj</a>* this_session_srv_arg, <span class="keyword">const</span> <a class="code hl_struct" href="structipc_1_1session_1_1Server__app.html">Server_app</a>&amp; srv_app_ref_arg,</div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno">  440</span>   <span class="keyword">const</span> <a class="code hl_typedef" href="structipc_1_1session_1_1Client__app.html#add718cbf6aa1d2abb26fbadcc974a7bd">Client_app::Master_set</a>&amp; cli_app_master_set_ref, <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code,</div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno">  441</span>   Per_app_setup_func&amp;&amp; per_app_setup_func) :</div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno">  442</span> </div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno">  443</span>  flow::log::Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceipc.html#a4ccdeed058222c635745a4dc830e99f7">Log_component</a>::S_SESSION),</div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno">  444</span>  m_srv_app_ref(srv_app_ref_arg), <span class="comment">// Not copied!</span></div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno">  445</span>  m_this_session_srv(this_session_srv_arg),</div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno">  446</span>  m_cli_app_master_set_ref(cli_app_master_set_ref), <span class="comment">// Ditto!</span></div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno">  447</span>  m_per_app_setup_func(std::move(per_app_setup_func)),</div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno">  448</span>  m_state(std::in_place) <span class="comment">// Default-ct State; initialize contents, further, just below.</span></div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno">  449</span>{</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno">  450</span>  <span class="keyword">using </span><a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">util::Process_credentials</a>;</div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno">  451</span>  <span class="keyword">using </span><a class="code hl_class" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html">transport::sync_io::Native_socket_stream</a>;</div>
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno">  452</span>  <span class="keyword">using </span>flow::error::Runtime_error;</div>
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno">  453</span>  <span class="keyword">using </span>boost::movelib::make_unique;</div>
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno">  454</span>  <span class="keyword">using </span>boost::system::system_category;</div>
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno">  455</span>  <span class="keyword">using </span>boost::io::ios_all_saver;</div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno">  456</span>  <span class="keyword">using </span>fs::ofstream;</div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno">  457</span>  <span class="keyword">using </span>Named_sh_mutex = boost::interprocess::named_mutex;</div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno">  458</span>  <span class="keyword">using </span>Named_sh_mutex_ptr = boost::movelib::unique_ptr&lt;Named_sh_mutex&gt;;</div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno">  459</span>  <span class="keyword">using </span>Sh_lock_guard = boost::interprocess::scoped_lock&lt;Named_sh_mutex&gt;;</div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno">  460</span>  <span class="comment">// using ::errno; // It&#39;s a macro apparently.</span></div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno">  461</span> </div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno">  462</span>  <span class="comment">// Finish setting up m_state.  See State members in order and deal with the ones needing explicit init.</span></div>
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno">  463</span>  <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#ac49be718ad86c3919563da57502d11b3">m_state</a>-&gt;m_last_cli_namespace = 0;</div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno">  464</span>  <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#ac49be718ad86c3919563da57502d11b3">m_state</a>-&gt;m_incomplete_session_graveyard = boost::movelib::make_unique&lt;flow::async::Single_thread_task_loop&gt;</div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno">  465</span>                                              (get_logger(),</div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno">  466</span>                                               flow::util::ostream_op_string(<span class="stringliteral">&quot;srv_sess_acc_graveyard[&quot;</span>, *<span class="keyword">this</span>, <span class="stringliteral">&quot;]&quot;</span>));</div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno">  467</span> </div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno">  468</span>  <span class="comment">/* This is a (as of this writing -- the) *cleanup point* for any MQs previously created on behalf of this</span></div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno">  469</span><span class="comment">   * Server_app by previous active processes before us; namely when either a Server_session or opposing Client_session</span></div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno">  470</span><span class="comment">   * performs open_channel() (or pre-opens channel(s) during session creation), so the Server_session_impl</span></div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno">  471</span><span class="comment">   * creates the actual `Persistent_mq_handle`s via its ctor in create-only mode.  These underlying MQs</span></div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno">  472</span><span class="comment">   * are gracefully cleaned up in Blob_stream_mq_send/receiver dtors (see their doc headers).  This cleanup point is a</span></div>
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno">  473</span><span class="comment">   * best-effort attempt to clean up anything that was skipped due to one or more such destructors never getting</span></div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno">  474</span><span class="comment">   * to run (due to crash, abort, etc.).  Note that Blob_stream_mq_send/receiver doc headers explicitly explain</span></div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno">  475</span><span class="comment">   * the need to worry about this contingency.</span></div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno">  476</span><span class="comment">   *</span></div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno">  477</span><span class="comment">   * We simply delete everything with the Shared_name prefix used when setting up the MQs</span></div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno">  478</span><span class="comment">   * (see Server_session_impl::make_channel_mqs()).  The prefix is everything up-to (not including) the PID</span></div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno">  479</span><span class="comment">   * (empty_session.base().srv_namespace() below).  Our own .srv_namespace() is</span></div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno">  480</span><span class="comment">   * just about to be determined and is unique across time by definition (internally, it&#39;s -- again -- our PID);</span></div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno">  481</span><span class="comment">   * so any existing MQs are by definition old.  Note that as of this writing there is at most *one* active</span></div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno">  482</span><span class="comment">   * process (instance) of a given Server_app.</span></div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno">  483</span><span class="comment">   *</span></div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno">  484</span><span class="comment">   * Subtlety (kind of): We worry about such cleanup only if some type of MQ is in fact enabled at compile-time</span></div>
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno">  485</span><span class="comment">   * of *this* application; and we only clean up that MQ type, not the other(s) (as of this writing there are 2,</span></div>
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno">  486</span><span class="comment">   * but that could change conceivably).  If the MQ type is changed (or MQs disabled) after a crash/abort, there</span></div>
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno">  487</span><span class="comment">   * could be a leak.  We could also indiscriminately clean-up all known MQ types here; that would be fine.</span></div>
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno">  488</span><span class="comment">   * @todo Maybe we should.  I don&#39;t know.  shm::classic::Session_server ctor&#39;s pool cleanup point is only invoked,</span></div>
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno">  489</span><span class="comment">   * if that is the type of Session_server user chose at compile-time, so we are just following that example.</span></div>
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno">  490</span><span class="comment">   * Doing it this way strikes me as cleaner code, and the combination of a crash/abort and changed software</span></div>
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno">  491</span><span class="comment">   * &quot;feels&quot; fairly minor. */</span></div>
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno">  492</span>  <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(Server_session_dtl_obj::Session_base_obj::S_MQS_ENABLED)</div>
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno">  493</span>  {</div>
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno">  494</span>    <span class="keyword">using </span><a class="code hl_class" href="classipc_1_1transport_1_1Blob__stream__mq__base.html">transport::Blob_stream_mq_base</a>;</div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno">  495</span>    <span class="keyword">using </span>Mq = <span class="keyword">typename</span> Server_session_dtl_obj::Session_base_obj::Persistent_mq_handle_from_cfg;</div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno">  496</span> </div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno">  497</span>    util::remove_each_persistent_with_name_prefix&lt;Blob_stream_mq_base&lt;Mq&gt;&gt;</div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno">  498</span>      (get_logger(),</div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno">  499</span>       <a class="code hl_function" href="namespaceipc_1_1session.html#a5216d618bb573e68276d2933ce3f4010">build_conventional_shared_name_prefix</a>(Mq::S_RESOURCE_TYPE_ID,</div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno">  500</span>                                             <a class="code hl_function" href="classipc_1_1util_1_1Shared__name.html#a48f20b7b54490aa10dc64081d34c55b2">Shared_name::ct</a>(<a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>.<a class="code hl_variable" href="structipc_1_1session_1_1App.html#a8e67b57829fe43a122a23c699b5de8fd">m_name</a>)));</div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno">  501</span>  }</div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno">  502</span> </div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno">  503</span>  <span class="comment">/* We want to write to CNS (PID file) just below, but what is its location, and the name of its associated</span></div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno">  504</span><span class="comment">   * inter-process mutex, and for that matter the contents (formally, the Current Namespace; really the PID)?</span></div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno">  505</span><span class="comment">   * Well, this is slightly cheesy, arguably, but any Server_session we produce will need all those values,</span></div>
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno">  506</span><span class="comment">   * and can compute them by itself, and they&#39;ll always be the same in this process (app instance), so let&#39;s</span></div>
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno">  507</span><span class="comment">   * just make this short-lived dummy Server_session_dtl and get the stuff out of there.  Code reuse = pretty good. */</span></div>
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno">  508</span>  <span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1session_1_1Server__session__dtl.html">Server_session_dtl_obj</a> empty_session(<span class="keyword">nullptr</span>, <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>, Native_socket_stream());</div>
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno">  509</span> </div>
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno">  510</span>  <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> our_err_code;</div>
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno">  511</span> </div>
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno">  512</span>  <span class="comment">/* Owner/mode discussion:</span></div>
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno">  513</span><span class="comment">   * ipc::session operates in a certain model (design doc is elsewhere/outside our scope here to fully justify)</span></div>
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno">  514</span><span class="comment">   * that requires, for security/safety:</span></div>
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno">  515</span><span class="comment">   *   - Owner has the specific UID:GID registered under Server_app.  If we are who we are supposed to be,</span></div>
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno">  516</span><span class="comment">   *     this will occur automatically as we create a resource.  Namely we have two relevant resources in here:</span></div>
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno">  517</span><span class="comment">   *     - CNS (PID) file.  Some reasons this could fail: if file already existed</span></div>
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno">  518</span><span class="comment">   *       *and* was created by someone else; if we have the proper UID but are also in some other group or something;</span></div>
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno">  519</span><span class="comment">   *       and lastly Server_app misconfiguration.  Mitigation: none.  For one of those we could do an owner-change</span></div>
<div class="line"><a id="l00520" name="l00520"></a><span class="lineno">  520</span><span class="comment">   *       call to change the group, but for now let&#39;s say it&#39;s overkill, and actually doing so might hide</span></div>
<div class="line"><a id="l00521" name="l00521"></a><span class="lineno">  521</span><span class="comment">   *       a problem in the environment: let&#39;s not even risk that stuff.</span></div>
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno">  522</span><span class="comment">   *     - Associated shared mutex (in Linux apparently a semaphore thingie).  This is an interesting situation;</span></div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno">  523</span><span class="comment">   *       it is not mentioned in the aforementioned design in detail -- too much of an impl detail for that --</span></div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno">  524</span><span class="comment">   *       so let&#39;s consider it.  Should the Server_app UID:GID apply to it too?  Actually not quite: the way we use it,</span></div>
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno">  525</span><span class="comment">   *       it&#39;s a symmetrically shared resource (read/write for both us and client), but more to the point</span></div>
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno">  526</span><span class="comment">   *       the *client* is *allowed* to create it (hence OPEN_OR_CREATE both here and in Client_session_impl): it&#39;s</span></div>
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno">  527</span><span class="comment">   *       accessed in order to get one&#39;s turn at accessing the CNS file, and to be &quot;accessed&quot; it must be created</span></div>
<div class="line"><a id="l00528" name="l00528"></a><span class="lineno">  528</span><span class="comment">   *       as needed (and then it&#39;ll keep existing until reboot).  So actually the *GID* should be correct</span></div>
<div class="line"><a id="l00529" name="l00529"></a><span class="lineno">  529</span><span class="comment">   *       according to Server_app, but the UID can be, in fact, Server_app&#39;s -- or Client_app&#39;s, or *another*</span></div>
<div class="line"><a id="l00530" name="l00530"></a><span class="lineno">  530</span><span class="comment">   *       Client_app&#39;s entirely, or any number of them!</span></div>
<div class="line"><a id="l00531" name="l00531"></a><span class="lineno">  531</span><span class="comment">   *       - So should we check something about the mutex&#39;s UID/GID then?</span></div>
<div class="line"><a id="l00532" name="l00532"></a><span class="lineno">  532</span><span class="comment">   *         - It would probably be not bad to check for the GID.  It is even conceivable to check the UID as that</span></div>
<div class="line"><a id="l00533" name="l00533"></a><span class="lineno">  533</span><span class="comment">   *           of one of the allowed `Client_app`s.</span></div>
<div class="line"><a id="l00534" name="l00534"></a><span class="lineno">  534</span><span class="comment">   *         - I (ygoldfel) feel it&#39;s overkill.  I could be wrong, but it just feels insane: the mutex is only a way</span></div>
<div class="line"><a id="l00535" name="l00535"></a><span class="lineno">  535</span><span class="comment">   *           to access CNS file in orderly fashion without concurrency issues.  Either it works, or it doesn&#39;t</span></div>
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno">  536</span><span class="comment">   *           work; trying to sanity-check that the right UID/GID owns it is going beyond the spirit of the design:</span></div>
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno">  537</span><span class="comment">   *           to make ascertain that &quot;certain model&quot; of trust/safety/security.  We already do that with CNS itself;</span></div>
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno">  538</span><span class="comment">   *           we don&#39;t need to be paranoid about the-thing-that-is-needed-to-use-CNS.</span></div>
<div class="line"><a id="l00539" name="l00539"></a><span class="lineno">  539</span><span class="comment">   *   - The mode is as dictated by Server_app::m_permissions_level_for_client_apps.  This we can and should</span></div>
<div class="line"><a id="l00540" name="l00540"></a><span class="lineno">  540</span><span class="comment">   *     ensure via a mode-set/change call.  There are subtleties about how to do that, but they&#39;re discussed</span></div>
<div class="line"><a id="l00541" name="l00541"></a><span class="lineno">  541</span><span class="comment">   *     near the call sites below.  As for now: We have two relevant resources in here, again:</span></div>
<div class="line"><a id="l00542" name="l00542"></a><span class="lineno">  542</span><span class="comment">   *     - CNS (PID) file.  Yes, indeed, we set its permissions below.</span></div>
<div class="line"><a id="l00543" name="l00543"></a><span class="lineno">  543</span><span class="comment">   *     - Associated shared mutex.  See above.  So, actually, we sets its permissions below too.  That is actually</span></div>
<div class="line"><a id="l00544" name="l00544"></a><span class="lineno">  544</span><span class="comment">   *       (though unmentioned in the design) a pretty good idea for the &quot;certain model&quot; in the design:</span></div>
<div class="line"><a id="l00545" name="l00545"></a><span class="lineno">  545</span><span class="comment">   *       If, say, it&#39;s set to unrestricted access, then any user could just acquire the lock... and block IPC</span></div>
<div class="line"><a id="l00546" name="l00546"></a><span class="lineno">  546</span><span class="comment">   *       from proceeding, ever, for anyone else wishing to work with that Server_app.  So, certainly,</span></div>
<div class="line"><a id="l00547" name="l00547"></a><span class="lineno">  547</span><span class="comment">   *       it should be locked down to the same extent as CNS itself.  What&#39;s interesting about that is that</span></div>
<div class="line"><a id="l00548" name="l00548"></a><span class="lineno">  548</span><span class="comment">   *       a client, too, can create it (again, see above) -- and thus needs to set some kind of sensible</span></div>
<div class="line"><a id="l00549" name="l00549"></a><span class="lineno">  549</span><span class="comment">   *       permissions on creation (if applicable).  And so it does... by checking Server_app [sic] as well and</span></div>
<div class="line"><a id="l00550" name="l00550"></a><span class="lineno">  550</span><span class="comment">   *       indeed setting that level of permissions.  Does it make sense?  Yes.  Here are the scenarios specifically:</span></div>
<div class="line"><a id="l00551" name="l00551"></a><span class="lineno">  551</span><span class="comment">   *       - If the access level in Server_app is set to NO_ACCESS: Well then no one can access it.  LoL.  Next.</span></div>
<div class="line"><a id="l00552" name="l00552"></a><span class="lineno">  552</span><span class="comment">   *       - If UNRESTRICTED: Well then it&#39;s meant to be world-accessible!  Yay!  LoL again!  Next.</span></div>
<div class="line"><a id="l00553" name="l00553"></a><span class="lineno">  553</span><span class="comment">   *       - If USER_ACCESS: Logically, for CNS to be accessible, if only the server UID is allowed access, then</span></div>
<div class="line"><a id="l00554" name="l00554"></a><span class="lineno">  554</span><span class="comment">   *         for it to interoperate with any clients, the clients must also be of that UID.  So the client</span></div>
<div class="line"><a id="l00555" name="l00555"></a><span class="lineno">  555</span><span class="comment">   *         setting the mode to *its* UID should accomplish the same as if server had done it.</span></div>
<div class="line"><a id="l00556" name="l00556"></a><span class="lineno">  556</span><span class="comment">   *       - If GROUP_ACCESS (the approach mandated by the design, though we don&#39;t assume it, hence the</span></div>
<div class="line"><a id="l00557" name="l00557"></a><span class="lineno">  557</span><span class="comment">   *         Server_app configuration): Same logic but applied to GID.</span></div>
<div class="line"><a id="l00558" name="l00558"></a><span class="lineno">  558</span><span class="comment">   *       Anyway, here on the server it&#39;s simple; we should set-mode similarly to how we do for CNS.</span></div>
<div class="line"><a id="l00559" name="l00559"></a><span class="lineno">  559</span><span class="comment">   *       The bulk of the above long explanation is why the client does it.  The comment in Client_session_impl</span></div>
<div class="line"><a id="l00560" name="l00560"></a><span class="lineno">  560</span><span class="comment">   *       points back to right here to avoid duplication.</span></div>
<div class="line"><a id="l00561" name="l00561"></a><span class="lineno">  561</span><span class="comment">   *</span></div>
<div class="line"><a id="l00562" name="l00562"></a><span class="lineno">  562</span><span class="comment">   * So let&#39;s do that stuff below. */</span></div>
<div class="line"><a id="l00563" name="l00563"></a><span class="lineno">  563</span> </div>
<div class="line"><a id="l00564" name="l00564"></a><span class="lineno">  564</span>  <span class="comment">/* Ensure our effective user is as configured in Server_app.  We do check this value on the CNS (PID) file</span></div>
<div class="line"><a id="l00565" name="l00565"></a><span class="lineno">  565</span><span class="comment">   * anyway; but this is still a good check because:</span></div>
<div class="line"><a id="l00566" name="l00566"></a><span class="lineno">  566</span><span class="comment">   *   - We might not be creating the file ourselves (first guy to get to it since boot is).</span></div>
<div class="line"><a id="l00567" name="l00567"></a><span class="lineno">  567</span><span class="comment">   *   - It eliminates the need (well, strong word but anyway) to keep checking that for various other</span></div>
<div class="line"><a id="l00568" name="l00568"></a><span class="lineno">  568</span><span class="comment">   *     resources created down the line, whether it&#39;s MQs or SHM pools or whatever else.</span></div>
<div class="line"><a id="l00569" name="l00569"></a><span class="lineno">  569</span><span class="comment">   *     Doing that is possible but:</span></div>
<div class="line"><a id="l00570" name="l00570"></a><span class="lineno">  570</span><span class="comment">   *     - annoying: it requires either a descriptor for an ::fstat() or a rather-unportable file-system-path for</span></div>
<div class="line"><a id="l00571" name="l00571"></a><span class="lineno">  571</span><span class="comment">   *       anything but actual files;</span></div>
<div class="line"><a id="l00572" name="l00572"></a><span class="lineno">  572</span><span class="comment">   *     - super-annoying: it requires deep-inside -- possibly even eventually user-supplied -- modules like</span></div>
<div class="line"><a id="l00573" name="l00573"></a><span class="lineno">  573</span><span class="comment">   *       the SHM-jemalloc module to be aware of the desire to even do this in the first place on every shared</span></div>
<div class="line"><a id="l00574" name="l00574"></a><span class="lineno">  574</span><span class="comment">   *       resource.</span></div>
<div class="line"><a id="l00575" name="l00575"></a><span class="lineno">  575</span><span class="comment">   *</span></div>
<div class="line"><a id="l00576" name="l00576"></a><span class="lineno">  576</span><span class="comment">   * The idea is: checking it here up-front, plus checking it on the CNS (PID) file (from which all IPC naming</span></div>
<div class="line"><a id="l00577" name="l00577"></a><span class="lineno">  577</span><span class="comment">   * and thus trust, per design, flows), is a nice way to take care of it ahead of all that.  It&#39;s not perfect:</span></div>
<div class="line"><a id="l00578" name="l00578"></a><span class="lineno">  578</span><span class="comment">   * the effective UID:GID can be changed at runtime.  We don&#39;t need to be perfect though: the whole</span></div>
<div class="line"><a id="l00579" name="l00579"></a><span class="lineno">  579</span><span class="comment">   * safety/security project, here, is not meant to be some kind of cryptographically powerful guarantee. */</span></div>
<div class="line"><a id="l00580" name="l00580"></a><span class="lineno">  580</span>  <span class="keyword">const</span> <span class="keyword">auto</span> own_creds = Process_credentials::own_process_credentials();</div>
<div class="line"><a id="l00581" name="l00581"></a><span class="lineno">  581</span>  <span class="keywordflow">if</span> ((own_creds.user_id() != <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>.<a class="code hl_variable" href="structipc_1_1session_1_1App.html#a9e32297579603f2d96616976474d0246">m_user_id</a>) || (own_creds.group_id() != <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>.<a class="code hl_variable" href="structipc_1_1session_1_1App.html#a78bb1e984835f429fd44869a83f4b093">m_group_id</a>))</div>
<div class="line"><a id="l00582" name="l00582"></a><span class="lineno">  582</span>  {</div>
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno">  583</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Creation underway.  However, just before writing &quot;</span></div>
<div class="line"><a id="l00584" name="l00584"></a><span class="lineno">  584</span>                     <span class="stringliteral">&quot;CNS (Current Namespace Store), a/k/a PID file, we determined that &quot;</span></div>
<div class="line"><a id="l00585" name="l00585"></a><span class="lineno">  585</span>                     <span class="stringliteral">&quot;the `user` aspect of our effective credentials [&quot;</span> &lt;&lt; own_creds &lt;&lt; <span class="stringliteral">&quot;] do not match &quot;</span></div>
<div class="line"><a id="l00586" name="l00586"></a><span class="lineno">  586</span>                     <span class="stringliteral">&quot;the hard-configured value passed to this ctor: &quot;</span></div>
<div class="line"><a id="l00587" name="l00587"></a><span class="lineno">  587</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>.<a class="code hl_variable" href="structipc_1_1session_1_1App.html#a9e32297579603f2d96616976474d0246">m_user_id</a> &lt;&lt; <span class="charliteral">&#39;:&#39;</span> &lt;&lt; <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>.<a class="code hl_variable" href="structipc_1_1session_1_1App.html#a78bb1e984835f429fd44869a83f4b093">m_group_id</a> &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00588" name="l00588"></a><span class="lineno">  588</span>                     <span class="stringliteral">&quot;We cannot proceed, as this would violate the security/safety model of ipc::session.  &quot;</span></div>
<div class="line"><a id="l00589" name="l00589"></a><span class="lineno">  589</span>                     <span class="stringliteral">&quot;Emitting error.&quot;</span>);</div>
<div class="line"><a id="l00590" name="l00590"></a><span class="lineno">  590</span>    our_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1session_1_1error.html#a0708d4bec9ae853f4d7e3d7822fc8f2fa5c437fa266aea0c8e2b348ee84dd61fa">error::Code::S_RESOURCE_OWNER_UNEXPECTED</a>;</div>
<div class="line"><a id="l00591" name="l00591"></a><span class="lineno">  591</span>  }</div>
<div class="line"><a id="l00592" name="l00592"></a><span class="lineno">  592</span>  <span class="keywordflow">else</span> <span class="comment">// if (own_creds match m_srv_app_ref.m_{user|group}_id)</span></div>
<div class="line"><a id="l00593" name="l00593"></a><span class="lineno">  593</span>  {</div>
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno">  594</span>    <span class="keyword">const</span> <span class="keyword">auto</span> mutex_name = empty_session.<a class="code hl_function" href="classipc_1_1session_1_1Server__session__dtl.html#ae91b835b0f82f071d695f9ae62ad9174">base</a>().cur_ns_store_mutex_absolute_name();</div>
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno">  595</span>    <span class="keyword">const</span> <span class="keyword">auto</span> mutex_perms = <a class="code hl_function" href="namespaceipc_1_1util.html#abda2ce5bcdbc26ca63d667b87818439c">util::shared_resource_permissions</a>(<a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>.<a class="code hl_variable" href="structipc_1_1session_1_1Server__app.html#abdcd9e8b0287f914496d45a99848be44">m_permissions_level_for_client_apps</a>);</div>
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno">  596</span>    <span class="keyword">const</span> <span class="keyword">auto</span> cns_path = empty_session.<a class="code hl_function" href="classipc_1_1session_1_1Server__session__dtl.html#ae91b835b0f82f071d695f9ae62ad9174">base</a>().cur_ns_store_absolute_path();</div>
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno">  597</span>    <span class="keyword">const</span> <span class="keyword">auto</span> cns_perms = <a class="code hl_variable" href="namespaceipc_1_1util.html#aa74a8b46a5b38021c662a0b3bdfb46bf">util::PRODUCER_CONSUMER_RESOURCE_PERMISSIONS_LVL_MAP</a></div>
<div class="line"><a id="l00598" name="l00598"></a><span class="lineno">  598</span>                             [size_t(<a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>.<a class="code hl_variable" href="structipc_1_1session_1_1Server__app.html#abdcd9e8b0287f914496d45a99848be44">m_permissions_level_for_client_apps</a>)];</div>
<div class="line"><a id="l00599" name="l00599"></a><span class="lineno">  599</span>    {</div>
<div class="line"><a id="l00600" name="l00600"></a><span class="lineno">  600</span>      ios_all_saver saver(*(get_logger()-&gt;this_thread_ostream())); <span class="comment">// Revert std::oct/etc. soon.</span></div>
<div class="line"><a id="l00601" name="l00601"></a><span class="lineno">  601</span>      FLOW_LOG_INFO(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Created.  Writing CNS (Current Namespace Store), a/k/a PID &quot;</span></div>
<div class="line"><a id="l00602" name="l00602"></a><span class="lineno">  602</span>                    <span class="stringliteral">&quot;file [&quot;</span> &lt;&lt; cns_path &lt;&lt; <span class="stringliteral">&quot;] (perms &quot;</span></div>
<div class="line"><a id="l00603" name="l00603"></a><span class="lineno">  603</span>                    <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; std::setfill(<span class="charliteral">&#39;0&#39;</span>)</div>
<div class="line"><a id="l00604" name="l00604"></a><span class="lineno">  604</span>                        &lt;&lt; std::setw(4) <span class="comment">// Subtlety: This resets right away after the perms are output...</span></div>
<div class="line"><a id="l00605" name="l00605"></a><span class="lineno">  605</span>                        &lt;&lt; std::oct &lt;&lt; cns_perms.get_permissions() &lt;&lt; <span class="stringliteral">&quot;], &quot;</span></div>
<div class="line"><a id="l00606" name="l00606"></a><span class="lineno">  606</span>                    <span class="stringliteral">&quot;shared-mutex name [&quot;</span> &lt;&lt; mutex_name &lt;&lt; <span class="stringliteral">&quot;], shared-mutex perms &quot;</span></div>
<div class="line"><a id="l00607" name="l00607"></a><span class="lineno">  607</span>                    <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; std::setw(4) <span class="comment">// ...hence gotta do this again.</span></div>
<div class="line"><a id="l00608" name="l00608"></a><span class="lineno">  608</span>                        &lt;&lt; mutex_perms.get_permissions() &lt;&lt; <span class="stringliteral">&quot;]); &quot;</span></div>
<div class="line"><a id="l00609" name="l00609"></a><span class="lineno">  609</span>                    <span class="stringliteral">&quot;then listening for incoming master socket stream &quot;</span></div>
<div class="line"><a id="l00610" name="l00610"></a><span class="lineno">  610</span>                    <span class="stringliteral">&quot;connects (through Native_socket_stream_acceptor that was just cted) to address &quot;</span></div>
<div class="line"><a id="l00611" name="l00611"></a><span class="lineno">  611</span>                    <span class="stringliteral">&quot;based partially on the namespace (PID) written to that file.&quot;</span>);</div>
<div class="line"><a id="l00612" name="l00612"></a><span class="lineno">  612</span>    }</div>
<div class="line"><a id="l00613" name="l00613"></a><span class="lineno">  613</span> </div>
<div class="line"><a id="l00614" name="l00614"></a><span class="lineno">  614</span>    <span class="comment">/* See Client_session_impl where it, too, creates this sh_mutex for notes equally applicable here.</span></div>
<div class="line"><a id="l00615" name="l00615"></a><span class="lineno">  615</span><span class="comment">     * It reads the file we are about to write and locks the same inter-process mutex accordingly. */</span></div>
<div class="line"><a id="l00616" name="l00616"></a><span class="lineno">  616</span>    Named_sh_mutex_ptr sh_mutex;</div>
<div class="line"><a id="l00617" name="l00617"></a><span class="lineno">  617</span>    <a class="code hl_function" href="namespaceipc_1_1util.html#abd43da87aa17031604c7906757c07d46">util::op_with_possible_bipc_exception</a>(get_logger(), &amp;our_err_code, <a class="code hl_enumvalue" href="namespaceipc_1_1session_1_1error.html#a0708d4bec9ae853f4d7e3d7822fc8f2fa7300721595cc25baa9a9e43bd76296aa">error::Code::S_MUTEX_BIPC_MISC_LIBRARY_ERROR</a>,</div>
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno">  618</span>                                          <span class="stringliteral">&quot;Server_session_impl::ctor:named-mutex-open-or-create&quot;</span>, [&amp;]()</div>
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno">  619</span>    {</div>
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno">  620</span>      sh_mutex = make_unique&lt;Named_sh_mutex&gt;(<a class="code hl_variable" href="namespaceipc_1_1util.html#a5664539b3d75d6d10cdfebf6eac5382d">util::OPEN_OR_CREATE</a>, mutex_name.native_str(), mutex_perms);</div>
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno">  621</span>      <span class="comment">/* Set the permissions as discussed in long comment above. --^</span></div>
<div class="line"><a id="l00622" name="l00622"></a><span class="lineno">  622</span><span class="comment">       * Bonus: All bipc OPEN_OR_CREATE guys take care to ensure permissions are set regardless of umask,</span></div>
<div class="line"><a id="l00623" name="l00623"></a><span class="lineno">  623</span><span class="comment">       * so no need for us to set_resource_permissions() here.</span></div>
<div class="line"><a id="l00624" name="l00624"></a><span class="lineno">  624</span><span class="comment">       *</span></div>
<div class="line"><a id="l00625" name="l00625"></a><span class="lineno">  625</span><span class="comment">       * As for ensuring ownership... skipping as discussed in long comment above. */</span></div>
<div class="line"><a id="l00626" name="l00626"></a><span class="lineno">  626</span>    });</div>
<div class="line"><a id="l00627" name="l00627"></a><span class="lineno">  627</span> </div>
<div class="line"><a id="l00628" name="l00628"></a><span class="lineno">  628</span>    <span class="keywordflow">if</span> (!our_err_code)</div>
<div class="line"><a id="l00629" name="l00629"></a><span class="lineno">  629</span>    {</div>
<div class="line"><a id="l00630" name="l00630"></a><span class="lineno">  630</span>      Sh_lock_guard sh_lock(*sh_mutex);</div>
<div class="line"><a id="l00631" name="l00631"></a><span class="lineno">  631</span> </div>
<div class="line"><a id="l00632" name="l00632"></a><span class="lineno">  632</span>      <span class="comment">/* Only set permissions if we in fact create CNS (PID) file.  Since we use mutex and trust mutex&#39;s other</span></div>
<div class="line"><a id="l00633" name="l00633"></a><span class="lineno">  633</span><span class="comment">       * users, we can atomically-enough check whether we create it by pre-checking its existence.  To pre-check</span></div>
<div class="line"><a id="l00634" name="l00634"></a><span class="lineno">  634</span><span class="comment">       * its existence use fs::exists().  fs::exists() can yield an error, but we intentionally eat any error</span></div>
<div class="line"><a id="l00635" name="l00635"></a><span class="lineno">  635</span><span class="comment">       * and treat it as-if file does not exist.  Whatever issue it was, if any, should get detected via ofstream</span></div>
<div class="line"><a id="l00636" name="l00636"></a><span class="lineno">  636</span><span class="comment">       * opening.  Hence, if there&#39;s an error, we pre-assume we_created_cns==true, and let the chips where they</span></div>
<div class="line"><a id="l00637" name="l00637"></a><span class="lineno">  637</span><span class="comment">       * may subsequently.  (Note this is all a low-probability eventuality.) */</span></div>
<div class="line"><a id="l00638" name="l00638"></a><span class="lineno">  638</span>      <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> dummy; <span class="comment">// Can&#39;t just use fs::exists(cns_path), as it might throw an exception (not what we want).</span></div>
<div class="line"><a id="l00639" name="l00639"></a><span class="lineno">  639</span>      <span class="keyword">const</span> <span class="keywordtype">bool</span> we_created_cns = !fs::exists(cns_path, dummy);</div>
<div class="line"><a id="l00640" name="l00640"></a><span class="lineno">  640</span>      ofstream cns_file(cns_path);</div>
<div class="line"><a id="l00641" name="l00641"></a><span class="lineno">  641</span>      <span class="comment">// Make it exist immediately (for the following check).  @todo Might be unnecessary.  At least it&#39;s harmless.</span></div>
<div class="line"><a id="l00642" name="l00642"></a><span class="lineno">  642</span>      cns_file.flush();</div>
<div class="line"><a id="l00643" name="l00643"></a><span class="lineno">  643</span> </div>
<div class="line"><a id="l00644" name="l00644"></a><span class="lineno">  644</span>      <span class="comment">/* Ensure owner is as configured.  (Is this redundant, given that we checked UID:GID above?  Yes and no:</span></div>
<div class="line"><a id="l00645" name="l00645"></a><span class="lineno">  645</span><span class="comment">       * yes, if we created it; no, if we hadn&#39;t.  So why not only check if (!we_created_cns)?  Answer: paranoia,</span></div>
<div class="line"><a id="l00646" name="l00646"></a><span class="lineno">  646</span><span class="comment">       * sanity checking.  We&#39;re not gonna do this check down the line for this session (per earlier-explained</span></div>
<div class="line"><a id="l00647" name="l00647"></a><span class="lineno">  647</span><span class="comment">       * decision), so might as well just sanity-check.</span></div>
<div class="line"><a id="l00648" name="l00648"></a><span class="lineno">  648</span><span class="comment">       *</span></div>
<div class="line"><a id="l00649" name="l00649"></a><span class="lineno">  649</span><span class="comment">       * Ideally we&#39;d:</span></div>
<div class="line"><a id="l00650" name="l00650"></a><span class="lineno">  650</span><span class="comment">       *   - Pass in an fstream-or-FD-or-similar (we&#39;ve opened the file after all, so there is one), not a name.</span></div>
<div class="line"><a id="l00651" name="l00651"></a><span class="lineno">  651</span><span class="comment">       *   - Use something in C++/C standard library or Boost, not an OS call.</span></div>
<div class="line"><a id="l00652" name="l00652"></a><span class="lineno">  652</span><span class="comment">       *</span></div>
<div class="line"><a id="l00653" name="l00653"></a><span class="lineno">  653</span><span class="comment">       * It&#39;s nice to want things.  On the FD front we&#39;re somewhat screwed; there is a gcc-oriented hack to get the FD,</span></div>
<div class="line"><a id="l00654" name="l00654"></a><span class="lineno">  654</span><span class="comment">       * but it involves protected access and non-standard stuff.  Hence we must work from the `path` cns_path.</span></div>
<div class="line"><a id="l00655" name="l00655"></a><span class="lineno">  655</span><span class="comment">       * We&#39;ve created it, so it really should work, even if it&#39;s a little slower or what-not.  As for using</span></div>
<div class="line"><a id="l00656" name="l00656"></a><span class="lineno">  656</span><span class="comment">       * a nice library... pass the buck: */</span></div>
<div class="line"><a id="l00657" name="l00657"></a><span class="lineno">  657</span>      <a class="code hl_function" href="namespaceipc_1_1session.html#a0eac87b284d50832334d819a8877cbaa">ensure_resource_owner_is_app</a>(get_logger(), cns_path, <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">m_srv_app_ref</a>, &amp;our_err_code);</div>
<div class="line"><a id="l00658" name="l00658"></a><span class="lineno">  658</span>      <span class="keywordflow">if</span> ((!our_err_code) &amp;&amp; we_created_cns)</div>
<div class="line"><a id="l00659" name="l00659"></a><span class="lineno">  659</span>      {</div>
<div class="line"><a id="l00660" name="l00660"></a><span class="lineno">  660</span>        <span class="comment">/* The owner check passed; and we just created it.  (At this stage fs::exists() having failed somehow is</span></div>
<div class="line"><a id="l00661" name="l00661"></a><span class="lineno">  661</span><span class="comment">         * more-or-less impossible: ensure_resource_owner_is_app() would&#39;ve failed if so.)  So:</span></div>
<div class="line"><a id="l00662" name="l00662"></a><span class="lineno">  662</span><span class="comment">         * Set mode.  Again, no great way to get an FD, nor to use the fstream itself.  So just: */</span></div>
<div class="line"><a id="l00663" name="l00663"></a><span class="lineno">  663</span>        <a class="code hl_function" href="namespaceipc_1_1util.html#abbba79fcaee378f433e7ce3093e5c435">util::set_resource_permissions</a>(get_logger(), cns_path, cns_perms, &amp;our_err_code);</div>
<div class="line"><a id="l00664" name="l00664"></a><span class="lineno">  664</span>        <span class="comment">// If it failed, it logged.</span></div>
<div class="line"><a id="l00665" name="l00665"></a><span class="lineno">  665</span>      } <span class="comment">// if (we_created_cns &amp;&amp; (!(our_err_code [from set_resource_permissions()])))</span></div>
<div class="line"><a id="l00666" name="l00666"></a><span class="lineno">  666</span> </div>
<div class="line"><a id="l00667" name="l00667"></a><span class="lineno">  667</span>      <span class="keywordflow">if</span> (!our_err_code)</div>
<div class="line"><a id="l00668" name="l00668"></a><span class="lineno">  668</span>      {</div>
<div class="line"><a id="l00669" name="l00669"></a><span class="lineno">  669</span>        cns_file &lt;&lt; empty_session.<a class="code hl_function" href="classipc_1_1session_1_1Server__session__dtl.html#ae91b835b0f82f071d695f9ae62ad9174">base</a>().srv_namespace().str() &lt;&lt; <span class="charliteral">&#39;\n&#39;</span>;</div>
<div class="line"><a id="l00670" name="l00670"></a><span class="lineno">  670</span> </div>
<div class="line"><a id="l00671" name="l00671"></a><span class="lineno">  671</span>        <span class="keywordflow">if</span> (!cns_file.good())</div>
<div class="line"><a id="l00672" name="l00672"></a><span class="lineno">  672</span>        {</div>
<div class="line"><a id="l00673" name="l00673"></a><span class="lineno">  673</span>          <span class="keyword">const</span> <span class="keyword">auto</span> sys_err_code = our_err_code = <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>(errno, system_category());</div>
<div class="line"><a id="l00674" name="l00674"></a><span class="lineno">  674</span>          FLOW_LOG_WARNING(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Could not open or write CNS (PID) file &quot;</span></div>
<div class="line"><a id="l00675" name="l00675"></a><span class="lineno">  675</span>                           <span class="stringliteral">&quot;file [&quot;</span> &lt;&lt; cns_path &lt;&lt; <span class="stringliteral">&quot;]; system error details follow.&quot;</span>);</div>
<div class="line"><a id="l00676" name="l00676"></a><span class="lineno">  676</span>          FLOW_ERROR_SYS_ERROR_LOG_WARNING(); <span class="comment">// Log based on sys_err_code.</span></div>
<div class="line"><a id="l00677" name="l00677"></a><span class="lineno">  677</span>        }</div>
<div class="line"><a id="l00678" name="l00678"></a><span class="lineno">  678</span>        <span class="comment">// Close file, unlock mutex.</span></div>
<div class="line"><a id="l00679" name="l00679"></a><span class="lineno">  679</span>      } <span class="comment">// if (!our_err_code) (from ensure_resource_owner_is_app(), or from set_resource_permissions())</span></div>
<div class="line"><a id="l00680" name="l00680"></a><span class="lineno">  680</span>      <span class="comment">// else { It logged. }</span></div>
<div class="line"><a id="l00681" name="l00681"></a><span class="lineno">  681</span>    } <span class="comment">// if (!our_err_code) (mutex creation)</span></div>
<div class="line"><a id="l00682" name="l00682"></a><span class="lineno">  682</span>    <span class="comment">// else { It logged. }</span></div>
<div class="line"><a id="l00683" name="l00683"></a><span class="lineno">  683</span> </div>
<div class="line"><a id="l00684" name="l00684"></a><span class="lineno">  684</span>    sh_mutex.reset(); <span class="comment">// Again, see note in Client_session_impl which does the same.</span></div>
<div class="line"><a id="l00685" name="l00685"></a><span class="lineno">  685</span>  } <span class="comment">// else if (own_creds match m_srv_app_ref.m_{user|group}_id) // Otherwise our_err_code is truthy.</span></div>
<div class="line"><a id="l00686" name="l00686"></a><span class="lineno">  686</span> </div>
<div class="line"><a id="l00687" name="l00687"></a><span class="lineno">  687</span>  <span class="keywordflow">if</span> (our_err_code)</div>
<div class="line"><a id="l00688" name="l00688"></a><span class="lineno">  688</span>  {</div>
<div class="line"><a id="l00689" name="l00689"></a><span class="lineno">  689</span>    <span class="keywordflow">if</span> (err_code)</div>
<div class="line"><a id="l00690" name="l00690"></a><span class="lineno">  690</span>    {</div>
<div class="line"><a id="l00691" name="l00691"></a><span class="lineno">  691</span>      *err_code = our_err_code;</div>
<div class="line"><a id="l00692" name="l00692"></a><span class="lineno">  692</span>      <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00693" name="l00693"></a><span class="lineno">  693</span>    }</div>
<div class="line"><a id="l00694" name="l00694"></a><span class="lineno">  694</span>    <span class="comment">// else</span></div>
<div class="line"><a id="l00695" name="l00695"></a><span class="lineno">  695</span>    <span class="keywordflow">throw</span> Runtime_error(our_err_code, FLOW_UTIL_WHERE_AM_I_STR());</div>
<div class="line"><a id="l00696" name="l00696"></a><span class="lineno">  696</span>  }</div>
<div class="line"><a id="l00697" name="l00697"></a><span class="lineno">  697</span>  <span class="comment">/* Got here: CNS (PID file) written fine.  Now we can listen on the socket stream acceptor derived off that value:</span></div>
<div class="line"><a id="l00698" name="l00698"></a><span class="lineno">  698</span><span class="comment">   * clients will read that file and thus know to connect to that. */</span></div>
<div class="line"><a id="l00699" name="l00699"></a><span class="lineno">  699</span> </div>
<div class="line"><a id="l00700" name="l00700"></a><span class="lineno">  700</span>  <span class="comment">// This might throw; or emit failure to *err_code; or neither (success).</span></div>
<div class="line"><a id="l00701" name="l00701"></a><span class="lineno">  701</span>  <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#ac49be718ad86c3919563da57502d11b3">m_state</a>-&gt;m_master_sock_acceptor</div>
<div class="line"><a id="l00702" name="l00702"></a><span class="lineno">  702</span>    = make_unique&lt;transport::Native_socket_stream_acceptor&gt;</div>
<div class="line"><a id="l00703" name="l00703"></a><span class="lineno">  703</span>        (get_logger(),</div>
<div class="line"><a id="l00704" name="l00704"></a><span class="lineno">  704</span>         empty_session.<a class="code hl_function" href="classipc_1_1session_1_1Server__session__dtl.html#ae91b835b0f82f071d695f9ae62ad9174">base</a>().session_master_socket_stream_acceptor_absolute_name(),</div>
<div class="line"><a id="l00705" name="l00705"></a><span class="lineno">  705</span>         err_code);</div>
<div class="line"><a id="l00706" name="l00706"></a><span class="lineno">  706</span> </div>
<div class="line"><a id="l00707" name="l00707"></a><span class="lineno">  707</span>  <span class="comment">// See class doc header.  Start this very-idle thread for a bit of corner case work.</span></div>
<div class="line"><a id="l00708" name="l00708"></a><span class="lineno">  708</span>  <span class="keywordflow">if</span> (err_code &amp;&amp; (!*err_code))</div>
<div class="line"><a id="l00709" name="l00709"></a><span class="lineno">  709</span>  {</div>
<div class="line"><a id="l00710" name="l00710"></a><span class="lineno">  710</span>    <a class="code hl_variable" href="classipc_1_1session_1_1Session__server__impl.html#ac49be718ad86c3919563da57502d11b3">m_state</a>-&gt;m_incomplete_session_graveyard-&gt;start();</div>
<div class="line"><a id="l00711" name="l00711"></a><span class="lineno">  711</span>  }</div>
<div class="line"><a id="l00712" name="l00712"></a><span class="lineno">  712</span>  <span class="comment">// else { Might as well not start that thread. }</span></div>
<div class="line"><a id="l00713" name="l00713"></a><span class="lineno">  713</span>} <span class="comment">// Session_server_impl::Session_server_impl()</span></div>
<div class="line"><a id="l00714" name="l00714"></a><span class="lineno">  714</span> </div>
<div class="line"><a id="l00715" name="l00715"></a><span class="lineno">  715</span><a class="code hl_define" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div>
<div class="line"><a id="l00716" name="l00716"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ae4388def520aad700a3fcdfc95b6f24e">  716</a></span>CLASS_SESSION_SERVER_IMPL::~Session_server_impl()</div>
<div class="line"><a id="l00717" name="l00717"></a><span class="lineno">  717</span>{</div>
<div class="line"><a id="l00718" name="l00718"></a><span class="lineno">  718</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Shutting down.  The Native_socket_stream_acceptor will now &quot;</span></div>
<div class="line"><a id="l00719" name="l00719"></a><span class="lineno">  719</span>                <span class="stringliteral">&quot;shut down, and all outstanding Native_socket_stream_acceptor handlers and Server_session &quot;</span></div>
<div class="line"><a id="l00720" name="l00720"></a><span class="lineno">  720</span>                <span class="stringliteral">&quot;handlers shall fire with operation-aborted error codes.&quot;</span>);</div>
<div class="line"><a id="l00721" name="l00721"></a><span class="lineno">  721</span>  <span class="comment">/* We&#39;ve written our internal async-op handlers in such a way as to get those operation-aborted handler</span></div>
<div class="line"><a id="l00722" name="l00722"></a><span class="lineno">  722</span><span class="comment">   * invocations to automatically occur as our various m_* are destroyed just past this line.</span></div>
<div class="line"><a id="l00723" name="l00723"></a><span class="lineno">  723</span><span class="comment">   * Namely:</span></div>
<div class="line"><a id="l00724" name="l00724"></a><span class="lineno">  724</span><span class="comment">   *   - m_master_sock_acceptor dtor runs: fires our handler with its operation-aborted code; we translate it</span></div>
<div class="line"><a id="l00725" name="l00725"></a><span class="lineno">  725</span><span class="comment">   *     into the expected operation-aborted code; cool.  This occurs with any such pending handlers.</span></div>
<div class="line"><a id="l00726" name="l00726"></a><span class="lineno">  726</span><span class="comment">   *   - m_incomplete_sessions dtor runs: Each Server_session_dtl_obj dtor runs: Any pending async_accept_log_in()</span></div>
<div class="line"><a id="l00727" name="l00727"></a><span class="lineno">  727</span><span class="comment">   *     emits the expected operation-aborted code; cool.</span></div>
<div class="line"><a id="l00728" name="l00728"></a><span class="lineno">  728</span><span class="comment">   *</span></div>
<div class="line"><a id="l00729" name="l00729"></a><span class="lineno">  729</span><span class="comment">   * Additionally via sub_class_set_deinit_func() we allow for certain final de-init code to be executed, once</span></div>
<div class="line"><a id="l00730" name="l00730"></a><span class="lineno">  730</span><span class="comment">   * all state has been destroyed (including what we just mentioned).  Hence force this to occur now: */</span></div>
<div class="line"><a id="l00731" name="l00731"></a><span class="lineno">  731</span>  m_state.reset();</div>
<div class="line"><a id="l00732" name="l00732"></a><span class="lineno">  732</span> </div>
<div class="line"><a id="l00733" name="l00733"></a><span class="lineno">  733</span>  <span class="comment">// Last thing!  See sub_class_set_deinit_func() doc header which will eventually lead you to a rationale comment.</span></div>
<div class="line"><a id="l00734" name="l00734"></a><span class="lineno">  734</span>  <span class="keywordflow">if</span> (!m_deinit_func_or_empty.empty())</div>
<div class="line"><a id="l00735" name="l00735"></a><span class="lineno">  735</span>  {</div>
<div class="line"><a id="l00736" name="l00736"></a><span class="lineno">  736</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Continuing shutdown.  A sub-class desires final de-init &quot;</span></div>
<div class="line"><a id="l00737" name="l00737"></a><span class="lineno">  737</span>                  <span class="stringliteral">&quot;work, once everything else is stopped (might be persistent resource cleanup); invoking &quot;</span></div>
<div class="line"><a id="l00738" name="l00738"></a><span class="lineno">  738</span>                  <span class="stringliteral">&quot;synchronously.&quot;</span>);</div>
<div class="line"><a id="l00739" name="l00739"></a><span class="lineno">  739</span>    m_deinit_func_or_empty();</div>
<div class="line"><a id="l00740" name="l00740"></a><span class="lineno">  740</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;De-init work finished.&quot;</span>);</div>
<div class="line"><a id="l00741" name="l00741"></a><span class="lineno">  741</span>  }</div>
<div class="line"><a id="l00742" name="l00742"></a><span class="lineno">  742</span>} <span class="comment">// Session_server_impl::~Session_server_impl()</span></div>
<div class="line"><a id="l00743" name="l00743"></a><span class="lineno">  743</span> </div>
<div class="line"><a id="l00744" name="l00744"></a><span class="lineno">  744</span><a class="code hl_define" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div>
<div class="line"><a id="l00745" name="l00745"></a><span class="lineno">  745</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Task_err,</div>
<div class="line"><a id="l00746" name="l00746"></a><span class="lineno">  746</span>         <span class="keyword">typename</span> N_init_channels_by_srv_req_func, <span class="keyword">typename</span> Mdt_load_func&gt;</div>
<div class="line"><a id="l00747" name="l00747"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a60ec88b23d73c354959a1e11636dc717">  747</a></span><span class="keywordtype">void</span> CLASS_SESSION_SERVER_IMPL::async_accept(<a class="code hl_class" href="classServer__session__t.html">Server_session_obj</a>* target_session,</div>
<div class="line"><a id="l00748" name="l00748"></a><span class="lineno">  748</span>                                             <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a9ad5c6cbb1c9378d42ec5cd909389dc2">Channels</a>* init_channels_by_srv_req,</div>
<div class="line"><a id="l00749" name="l00749"></a><span class="lineno">  749</span>                                             <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a86de1d5b7cae35d89827c3235e2b8d89">Mdt_reader_ptr</a>* mdt_from_cli_or_null,</div>
<div class="line"><a id="l00750" name="l00750"></a><span class="lineno">  750</span>                                             <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a9ad5c6cbb1c9378d42ec5cd909389dc2">Channels</a>* init_channels_by_cli_req,</div>
<div class="line"><a id="l00751" name="l00751"></a><span class="lineno">  751</span>                                             N_init_channels_by_srv_req_func&amp;&amp; n_init_channels_by_srv_req_func,</div>
<div class="line"><a id="l00752" name="l00752"></a><span class="lineno">  752</span>                                             Mdt_load_func&amp;&amp; mdt_load_func,</div>
<div class="line"><a id="l00753" name="l00753"></a><span class="lineno">  753</span>                                             Task_err&amp;&amp; on_done_handler)</div>
<div class="line"><a id="l00754" name="l00754"></a><span class="lineno">  754</span>{</div>
<div class="line"><a id="l00755" name="l00755"></a><span class="lineno">  755</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">util::String_view</a>;</div>
<div class="line"><a id="l00756" name="l00756"></a><span class="lineno">  756</span>  <span class="keyword">using </span>flow::async::Task_asio_err;</div>
<div class="line"><a id="l00757" name="l00757"></a><span class="lineno">  757</span>  <span class="keyword">using </span>boost::make_shared;</div>
<div class="line"><a id="l00758" name="l00758"></a><span class="lineno">  758</span>  <span class="keyword">using </span>std::to_string;</div>
<div class="line"><a id="l00759" name="l00759"></a><span class="lineno">  759</span>  <span class="keyword">using </span>std::string;</div>
<div class="line"><a id="l00760" name="l00760"></a><span class="lineno">  760</span> </div>
<div class="line"><a id="l00761" name="l00761"></a><span class="lineno">  761</span>  assert(target_session);</div>
<div class="line"><a id="l00762" name="l00762"></a><span class="lineno">  762</span>  assert(m_state-&gt;m_master_sock_acceptor &amp;&amp; <span class="stringliteral">&quot;By contract do not invoke async_accept() if ctor failed.&quot;</span>);</div>
<div class="line"><a id="l00763" name="l00763"></a><span class="lineno">  763</span> </div>
<div class="line"><a id="l00764" name="l00764"></a><span class="lineno">  764</span>  <span class="comment">/* We are in thread U or Wa or one of the Ws.  U is obviously fine/mainstream.  Ws means they invoked us</span></div>
<div class="line"><a id="l00765" name="l00765"></a><span class="lineno">  765</span><span class="comment">   * directly from our own completion handler again; it is fine, since a Ws is started per async_accept();</span></div>
<div class="line"><a id="l00766" name="l00766"></a><span class="lineno">  766</span><span class="comment">   * does not interact with other Ws.  Wa means they invoked us directly from our own completion handler</span></div>
<div class="line"><a id="l00767" name="l00767"></a><span class="lineno">  767</span><span class="comment">   * again, albeit only on error would that be from Wa; anyway Native_socket_stream_acceptor allows it. */</span></div>
<div class="line"><a id="l00768" name="l00768"></a><span class="lineno">  768</span> </div>
<div class="line"><a id="l00769" name="l00769"></a><span class="lineno">  769</span>  Task_asio_err on_done_func(std::move(on_done_handler));</div>
<div class="line"><a id="l00770" name="l00770"></a><span class="lineno">  770</span>  <span class="keyword">auto</span> sock_stm = make_shared&lt;transport::sync_io::Native_socket_stream&gt;(); <span class="comment">// Empty target socket stream.</span></div>
<div class="line"><a id="l00771" name="l00771"></a><span class="lineno">  771</span>  <span class="keyword">const</span> <span class="keyword">auto</span> sock_stm_raw = sock_stm.get();</div>
<div class="line"><a id="l00772" name="l00772"></a><span class="lineno">  772</span> </div>
<div class="line"><a id="l00773" name="l00773"></a><span class="lineno">  773</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Async-accept request: Immediately issuing socket stream &quot;</span></div>
<div class="line"><a id="l00774" name="l00774"></a><span class="lineno">  774</span>                <span class="stringliteral">&quot;acceptor async-accept as step 1.  If that async-succeeds, we will complete the login asynchronously; &quot;</span></div>
<div class="line"><a id="l00775" name="l00775"></a><span class="lineno">  775</span>                <span class="stringliteral">&quot;if that succeeds we will finally emit the ready-to-go session to user via handler.&quot;</span>);</div>
<div class="line"><a id="l00776" name="l00776"></a><span class="lineno">  776</span>  m_state-&gt;m_master_sock_acceptor-&gt;async_accept</div>
<div class="line"><a id="l00777" name="l00777"></a><span class="lineno">  777</span>    (sock_stm_raw,</div>
<div class="line"><a id="l00778" name="l00778"></a><span class="lineno">  778</span>     [<span class="keyword">this</span>, target_session, init_channels_by_srv_req, mdt_from_cli_or_null,</div>
<div class="line"><a id="l00779" name="l00779"></a><span class="lineno">  779</span>      init_channels_by_cli_req,</div>
<div class="line"><a id="l00780" name="l00780"></a><span class="lineno">  780</span>      n_init_channels_by_srv_req_func = std::move(n_init_channels_by_srv_req_func),</div>
<div class="line"><a id="l00781" name="l00781"></a><span class="lineno">  781</span>      mdt_load_func = std::move(mdt_load_func),</div>
<div class="line"><a id="l00782" name="l00782"></a><span class="lineno">  782</span>      sock_stm = std::move(sock_stm),</div>
<div class="line"><a id="l00783" name="l00783"></a><span class="lineno">  783</span>      on_done_func = std::move(on_done_func)]</div>
<div class="line"><a id="l00784" name="l00784"></a><span class="lineno">  784</span>       (<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>&amp; err_code) <span class="keyword">mutable</span></div>
<div class="line"><a id="l00785" name="l00785"></a><span class="lineno">  785</span>  {</div>
<div class="line"><a id="l00786" name="l00786"></a><span class="lineno">  786</span>    <span class="comment">// We are in thread Wa (unspecified; really N_s_s_acceptor worker thread).</span></div>
<div class="line"><a id="l00787" name="l00787"></a><span class="lineno">  787</span> </div>
<div class="line"><a id="l00788" name="l00788"></a><span class="lineno">  788</span>    <span class="keywordflow">if</span> (err_code)</div>
<div class="line"><a id="l00789" name="l00789"></a><span class="lineno">  789</span>    {</div>
<div class="line"><a id="l00790" name="l00790"></a><span class="lineno">  790</span>      <span class="comment">/* Couple cases to consider.  1, could&#39;ve failed with a true (probably system) error.</span></div>
<div class="line"><a id="l00791" name="l00791"></a><span class="lineno">  791</span><span class="comment">       * 2, it could&#39;ve failed with operation-aborted which can only occur if m_master_sock_acceptor is destroyed</span></div>
<div class="line"><a id="l00792" name="l00792"></a><span class="lineno">  792</span><span class="comment">       * during the async_accept(), which in turn can only happen if *this is destroyed during it.</span></div>
<div class="line"><a id="l00793" name="l00793"></a><span class="lineno">  793</span><span class="comment">       *</span></div>
<div class="line"><a id="l00794" name="l00794"></a><span class="lineno">  794</span><span class="comment">       * 1 is straightforward; just report the error through user handler, and that&#39;s that.  As for 2:</span></div>
<div class="line"><a id="l00795" name="l00795"></a><span class="lineno">  795</span><span class="comment">       *</span></div>
<div class="line"><a id="l00796" name="l00796"></a><span class="lineno">  796</span><span class="comment">       * Since we&#39;ve decided to (as explained in Implementation section of our class doc header) fully piggy-back</span></div>
<div class="line"><a id="l00797" name="l00797"></a><span class="lineno">  797</span><span class="comment">       * all work, including handlers, on our helper objects&#39; (m_master_sock_acceptor, or in step 2 the</span></div>
<div class="line"><a id="l00798" name="l00798"></a><span class="lineno">  798</span><span class="comment">       * Server_session itself) worker threads, we can just report operation-aborted through user handler as well.</span></div>
<div class="line"><a id="l00799" name="l00799"></a><span class="lineno">  799</span><span class="comment">       * Our dtor doesn&#39;t then need to worry about (having tracked un-fired user handlers) firing un-fired handlers:</span></div>
<div class="line"><a id="l00800" name="l00800"></a><span class="lineno">  800</span><span class="comment">       * we will just do so by piggy-backing on m_master_sock_acceptor doing so.  Code is much simpler then.</span></div>
<div class="line"><a id="l00801" name="l00801"></a><span class="lineno">  801</span><span class="comment">       *</span></div>
<div class="line"><a id="l00802" name="l00802"></a><span class="lineno">  802</span><span class="comment">       * Subtlety: avoid even logging.  Logging is safe for 1, but it&#39;s not that high in value.  I believe</span></div>
<div class="line"><a id="l00803" name="l00803"></a><span class="lineno">  803</span><span class="comment">       * logging is safe in 2, because m_master_sock_acceptor dtor will only return once it has fired the</span></div>
<div class="line"><a id="l00804" name="l00804"></a><span class="lineno">  804</span><span class="comment">       * handler (with operation-aborted), which happens before Log_context super-class is destroyed... but</span></div>
<div class="line"><a id="l00805" name="l00805"></a><span class="lineno">  805</span><span class="comment">       * generally we avoid extra code on operation-aborted everywhere in Flow-IPC and `flow` (that I (ygoldfel)</span></div>
<div class="line"><a id="l00806" name="l00806"></a><span class="lineno">  806</span><span class="comment">       * control anyway), so let&#39;s just keep to that.  @todo Maybe re-add TRACE logging when not operation-aborted.</span></div>
<div class="line"><a id="l00807" name="l00807"></a><span class="lineno">  807</span><span class="comment">       *</span></div>
<div class="line"><a id="l00808" name="l00808"></a><span class="lineno">  808</span><span class="comment">       * If you change this, please consider synchronizing with the async_accept_log_in() handler below.</span></div>
<div class="line"><a id="l00809" name="l00809"></a><span class="lineno">  809</span><span class="comment">       *</span></div>
<div class="line"><a id="l00810" name="l00810"></a><span class="lineno">  810</span><span class="comment">       * Subtlety: transport:: and session:: have separate operation-aborted codes, and we promised the latter so: */</span></div>
<div class="line"><a id="l00811" name="l00811"></a><span class="lineno">  811</span>      on_done_func((err_code == <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297afe29343445a7bf167cc186a44bd2c6ed">transport::error::Code::S_OBJECT_SHUTDOWN_ABORTED_COMPLETION_HANDLER</a>)</div>
<div class="line"><a id="l00812" name="l00812"></a><span class="lineno">  812</span>                     ? <a class="code hl_enumvalue" href="namespaceipc_1_1session_1_1error.html#a0708d4bec9ae853f4d7e3d7822fc8f2fafe29343445a7bf167cc186a44bd2c6ed">error::Code::S_OBJECT_SHUTDOWN_ABORTED_COMPLETION_HANDLER</a> : err_code);</div>
<div class="line"><a id="l00813" name="l00813"></a><span class="lineno">  813</span>      <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00814" name="l00814"></a><span class="lineno">  814</span>    } <span class="comment">// if (err_code)</span></div>
<div class="line"><a id="l00815" name="l00815"></a><span class="lineno">  815</span>    <span class="comment">// else: No problem at this async-stage.</span></div>
<div class="line"><a id="l00816" name="l00816"></a><span class="lineno">  816</span> </div>
<div class="line"><a id="l00817" name="l00817"></a><span class="lineno">  817</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Async-accept request: Socket stream &quot;</span></div>
<div class="line"><a id="l00818" name="l00818"></a><span class="lineno">  818</span>                  <span class="stringliteral">&quot;acceptor async-accept succeeded resulting in socket stream [&quot;</span> &lt;&lt; *sock_stm &lt;&lt; <span class="stringliteral">&quot;]; that was step &quot;</span></div>
<div class="line"><a id="l00819" name="l00819"></a><span class="lineno">  819</span>                  <span class="stringliteral">&quot;1.  Now we create the server session and have it undergo async-login; if that succeeds we will &quot;</span></div>
<div class="line"><a id="l00820" name="l00820"></a><span class="lineno">  820</span>                  <span class="stringliteral">&quot;finally emit the ready-to-go session to user via handler.&quot;</span>);</div>
<div class="line"><a id="l00821" name="l00821"></a><span class="lineno">  821</span> </div>
<div class="line"><a id="l00822" name="l00822"></a><span class="lineno">  822</span>    <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a3a608ab714f6a6725e6122470d87713f">Incomplete_session</a> incomplete_session</div>
<div class="line"><a id="l00823" name="l00823"></a><span class="lineno">  823</span>      = make_shared&lt;Server_session_dtl_obj&gt;(get_logger(),</div>
<div class="line"><a id="l00824" name="l00824"></a><span class="lineno">  824</span>                                            m_srv_app_ref, <span class="comment">// Not copied!</span></div>
<div class="line"><a id="l00825" name="l00825"></a><span class="lineno">  825</span>                                            <span class="comment">// Gobble up the stream obj into the channel in session:</span></div>
<div class="line"><a id="l00826" name="l00826"></a><span class="lineno">  826</span>                                            std::move(*sock_stm));</div>
<div class="line"><a id="l00827" name="l00827"></a><span class="lineno">  827</span>    <span class="comment">/* It&#39;s important that we save this in *this, so that if *this is destroyed, then *incomplete_session is</span></div>
<div class="line"><a id="l00828" name="l00828"></a><span class="lineno">  828</span><span class="comment">     * destroyed, so that it triggers the handler below with operation-aborted, so that we pass that on to</span></div>
<div class="line"><a id="l00829" name="l00829"></a><span class="lineno">  829</span><span class="comment">     * the user handler as promised.  However it is therefore essential that we don&#39;t also capture</span></div>
<div class="line"><a id="l00830" name="l00830"></a><span class="lineno">  830</span><span class="comment">     * incomplete_session (the shared_ptr!) in our handler lambda but rather only the observer (weak_ptr) of it!</span></div>
<div class="line"><a id="l00831" name="l00831"></a><span class="lineno">  831</span><span class="comment">     * Otherwise we create a cycle and a memory leak. */</span></div>
<div class="line"><a id="l00832" name="l00832"></a><span class="lineno">  832</span>    {</div>
<div class="line"><a id="l00833" name="l00833"></a><span class="lineno">  833</span>      <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a5e864e857a767101ed964f532b06acd4">Lock_guard</a> incomplete_sessions_lock(m_state-&gt;m_mutex);</div>
<div class="line"><a id="l00834" name="l00834"></a><span class="lineno">  834</span>      m_state-&gt;m_incomplete_sessions.insert(incomplete_session);</div>
<div class="line"><a id="l00835" name="l00835"></a><span class="lineno">  835</span>    }</div>
<div class="line"><a id="l00836" name="l00836"></a><span class="lineno">  836</span> </div>
<div class="line"><a id="l00837" name="l00837"></a><span class="lineno">  837</span>    <span class="comment">// This little hook is required by Server_session_dtl::async_accept_log_in() for Client_app* lookup and related.</span></div>
<div class="line"><a id="l00838" name="l00838"></a><span class="lineno">  838</span>    <span class="keyword">auto</span> cli_app_lookup_func = [<span class="keyword">this</span>](<a class="code hl_typedef" href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">String_view</a> cli_app_name) -&gt; <span class="keyword">const</span> <a class="code hl_struct" href="structipc_1_1session_1_1Client__app.html">Client_app</a>*</div>
<div class="line"><a id="l00839" name="l00839"></a><span class="lineno">  839</span>    {</div>
<div class="line"><a id="l00840" name="l00840"></a><span class="lineno">  840</span>      <span class="keyword">const</span> <span class="keyword">auto</span> cli_it = m_cli_app_master_set_ref.find(<span class="keywordtype">string</span>(cli_app_name));</div>
<div class="line"><a id="l00841" name="l00841"></a><span class="lineno">  841</span>      <span class="keywordflow">return</span> (cli_it == m_cli_app_master_set_ref.end()) ? <span class="keyword">static_cast&lt;</span><span class="keyword">const </span><a class="code hl_struct" href="structipc_1_1session_1_1Client__app.html">Client_app</a>*<span class="keyword">&gt;</span>(0) : &amp;cli_it-&gt;second;</div>
<div class="line"><a id="l00842" name="l00842"></a><span class="lineno">  842</span>    };</div>
<div class="line"><a id="l00843" name="l00843"></a><span class="lineno">  843</span> </div>
<div class="line"><a id="l00844" name="l00844"></a><span class="lineno">  844</span>    <span class="comment">/* And this one is required to issue a unique cli-namespace, if all goes well.  The &quot;if all goes well&quot; part</span></div>
<div class="line"><a id="l00845" name="l00845"></a><span class="lineno">  845</span><span class="comment">     * is why it&#39;s a hook and not just pre-computed and passed-into async_accept_log_in() as an arg. */</span></div>
<div class="line"><a id="l00846" name="l00846"></a><span class="lineno">  846</span>    <span class="keyword">auto</span> cli_namespace_func = [<span class="keyword">this</span>]() -&gt; <a class="code hl_class" href="classipc_1_1util_1_1Shared__name.html">Shared_name</a></div>
<div class="line"><a id="l00847" name="l00847"></a><span class="lineno">  847</span>    {</div>
<div class="line"><a id="l00848" name="l00848"></a><span class="lineno">  848</span>      <span class="keywordflow">return</span> <a class="code hl_function" href="classipc_1_1util_1_1Shared__name.html#a48f20b7b54490aa10dc64081d34c55b2">Shared_name::ct</a>(to_string(++m_state-&gt;m_last_cli_namespace));</div>
<div class="line"><a id="l00849" name="l00849"></a><span class="lineno">  849</span>    };</div>
<div class="line"><a id="l00850" name="l00850"></a><span class="lineno">  850</span> </div>
<div class="line"><a id="l00851" name="l00851"></a><span class="lineno">  851</span>    <span class="comment">/* Lastly, we are to execute this upon knowing the Client_app and before the log-in response it sent to</span></div>
<div class="line"><a id="l00852" name="l00852"></a><span class="lineno">  852</span><span class="comment">     * opposing Client_session. */</span></div>
<div class="line"><a id="l00853" name="l00853"></a><span class="lineno">  853</span>    <span class="keyword">auto</span> pre_rsp_setup_func = [<span class="keyword">this</span>,</div>
<div class="line"><a id="l00854" name="l00854"></a><span class="lineno">  854</span>                               incomplete_session_observer = <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#ae66f28a17f3cdd72d97212126483650a">Incomplete_session_observer</a>(incomplete_session)]</div>
<div class="line"><a id="l00855" name="l00855"></a><span class="lineno">  855</span>                                () -&gt; <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a></div>
<div class="line"><a id="l00856" name="l00856"></a><span class="lineno">  856</span>    {</div>
<div class="line"><a id="l00857" name="l00857"></a><span class="lineno">  857</span>      <span class="comment">// We are in thread Ws (unspecified; really Server_session worker thread).</span></div>
<div class="line"><a id="l00858" name="l00858"></a><span class="lineno">  858</span> </div>
<div class="line"><a id="l00859" name="l00859"></a><span class="lineno">  859</span>      <span class="comment">// (Could have captured incomplete_session itself, but I&#39;d rather assert() than leak.)</span></div>
<div class="line"><a id="l00860" name="l00860"></a><span class="lineno">  860</span>      <span class="keyword">auto</span> incomplete_session = incomplete_session_observer.lock();</div>
<div class="line"><a id="l00861" name="l00861"></a><span class="lineno">  861</span>      assert(incomplete_session</div>
<div class="line"><a id="l00862" name="l00862"></a><span class="lineno">  862</span>             &amp;&amp; <span class="stringliteral">&quot;The Server_session_dtl_obj cannot be dead (dtor ran), if it&#39;s invoking its async handlers OK &quot;</span></div>
<div class="line"><a id="l00863" name="l00863"></a><span class="lineno">  863</span>                  <span class="stringliteral">&quot;(and thus calling us in its async_accept_log_in() success path.&quot;</span>);</div>
<div class="line"><a id="l00864" name="l00864"></a><span class="lineno">  864</span>      <span class="comment">// If it&#39;s not dead, we&#39;re not dead either (as us dying is the only reason incomplete_session would die).</span></div>
<div class="line"><a id="l00865" name="l00865"></a><span class="lineno">  865</span> </div>
<div class="line"><a id="l00866" name="l00866"></a><span class="lineno">  866</span>      <span class="keyword">const</span> <span class="keyword">auto</span> cli_app_ptr = incomplete_session-&gt;base().cli_app_ptr();</div>
<div class="line"><a id="l00867" name="l00867"></a><span class="lineno">  867</span>      assert(cli_app_ptr &amp;&amp; <span class="stringliteral">&quot;async_accept_log_in() contract is to call pre_rsp_setup_func() once all &quot;</span></div>
<div class="line"><a id="l00868" name="l00868"></a><span class="lineno">  868</span>                              <span class="stringliteral">&quot;the basic elements of Session_base are known (including Client_app&amp;).&quot;</span>);</div>
<div class="line"><a id="l00869" name="l00869"></a><span class="lineno">  869</span> </div>
<div class="line"><a id="l00870" name="l00870"></a><span class="lineno">  870</span>      <span class="keywordflow">return</span> m_per_app_setup_func(*cli_app_ptr);</div>
<div class="line"><a id="l00871" name="l00871"></a><span class="lineno">  871</span>    }; <span class="comment">// auto pre_rsp_setup_func =</span></div>
<div class="line"><a id="l00872" name="l00872"></a><span class="lineno">  872</span> </div>
<div class="line"><a id="l00873" name="l00873"></a><span class="lineno">  873</span>    <span class="comment">/* @todo It occurs to me (ygoldfel) now that I look at it: all these args -- even on_done_func --</span></div>
<div class="line"><a id="l00874" name="l00874"></a><span class="lineno">  874</span><span class="comment">     * could instead be passed into Server_session_dtl ctor; that guy could save them into m_* (as of this writing</span></div>
<div class="line"><a id="l00875" name="l00875"></a><span class="lineno">  875</span><span class="comment">     * it passes them around via lambdas).  After all, as of now, async_accept_log_in() is non-retriable.</span></div>
<div class="line"><a id="l00876" name="l00876"></a><span class="lineno">  876</span><span class="comment">     * Pros: much less lambda-capture boiler-plate in there.</span></div>
<div class="line"><a id="l00877" name="l00877"></a><span class="lineno">  877</span><span class="comment">     * Cons: (1) added state can leak (they&#39;d need to worry about maybe clearing that stuff on entry to almost-PEER</span></div>
<div class="line"><a id="l00878" name="l00878"></a><span class="lineno">  878</span><span class="comment">     * state, and possibly on failure); (2) arguably less maintainable (maybe Server_session_dtl may want to</span></div>
<div class="line"><a id="l00879" name="l00879"></a><span class="lineno">  879</span><span class="comment">     * make async_accept() re-triable a-la Client_session_impl::async_connect()?).</span></div>
<div class="line"><a id="l00880" name="l00880"></a><span class="lineno">  880</span><span class="comment">     *</span></div>
<div class="line"><a id="l00881" name="l00881"></a><span class="lineno">  881</span><span class="comment">     * I, personally, have a big bias against non-const m_* state (where it can be avoided reasonably), so I</span></div>
<div class="line"><a id="l00882" name="l00882"></a><span class="lineno">  882</span><span class="comment">     * like that this stuff only stays around via captures, until the relevant async-op is finished.  So I prefer</span></div>
<div class="line"><a id="l00883" name="l00883"></a><span class="lineno">  883</span><span class="comment">     * it this way.  Still: arguable.</span></div>
<div class="line"><a id="l00884" name="l00884"></a><span class="lineno">  884</span><span class="comment">     *</span></div>
<div class="line"><a id="l00885" name="l00885"></a><span class="lineno">  885</span><span class="comment">     * Anyway.  Go! */</span></div>
<div class="line"><a id="l00886" name="l00886"></a><span class="lineno">  886</span> </div>
<div class="line"><a id="l00887" name="l00887"></a><span class="lineno">  887</span>    incomplete_session-&gt;async_accept_log_in</div>
<div class="line"><a id="l00888" name="l00888"></a><span class="lineno">  888</span>      (<span class="keyword">this</span>,</div>
<div class="line"><a id="l00889" name="l00889"></a><span class="lineno">  889</span>       init_channels_by_srv_req, <span class="comment">// Our async out-arg for them to set on success (before on_done_func(Error_code())).</span></div>
<div class="line"><a id="l00890" name="l00890"></a><span class="lineno">  890</span>       mdt_from_cli_or_null, <span class="comment">// Ditto.</span></div>
<div class="line"><a id="l00891" name="l00891"></a><span class="lineno">  891</span>       init_channels_by_cli_req, <span class="comment">// Ditto.</span></div>
<div class="line"><a id="l00892" name="l00892"></a><span class="lineno">  892</span> </div>
<div class="line"><a id="l00893" name="l00893"></a><span class="lineno">  893</span>       std::move(cli_app_lookup_func), <span class="comment">// Look up Client_app by name and give it to them!</span></div>
<div class="line"><a id="l00894" name="l00894"></a><span class="lineno">  894</span>       std::move(cli_namespace_func), <span class="comment">// Generate new per-session namespace and give it to them!</span></div>
<div class="line"><a id="l00895" name="l00895"></a><span class="lineno">  895</span>       std::move(pre_rsp_setup_func), <span class="comment">// Set up stuff necessary for this Client_app, especially if 1st occurrence!</span></div>
<div class="line"><a id="l00896" name="l00896"></a><span class="lineno">  896</span> </div>
<div class="line"><a id="l00897" name="l00897"></a><span class="lineno">  897</span>       std::move(n_init_channels_by_srv_req_func), <span class="comment">// How many channels does our caller want to set up?</span></div>
<div class="line"><a id="l00898" name="l00898"></a><span class="lineno">  898</span>       std::move(mdt_load_func), <span class="comment">// Let caller fill out srv-&gt;cli metadata!</span></div>
<div class="line"><a id="l00899" name="l00899"></a><span class="lineno">  899</span> </div>
<div class="line"><a id="l00900" name="l00900"></a><span class="lineno">  900</span>       [<span class="keyword">this</span>, incomplete_session_observer = <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#ae66f28a17f3cdd72d97212126483650a">Incomplete_session_observer</a>(incomplete_session),</div>
<div class="line"><a id="l00901" name="l00901"></a><span class="lineno">  901</span>        target_session, on_done_func = std::move(on_done_func)]</div>
<div class="line"><a id="l00902" name="l00902"></a><span class="lineno">  902</span>         (<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>&amp; async_err_code)</div>
<div class="line"><a id="l00903" name="l00903"></a><span class="lineno">  903</span>    {</div>
<div class="line"><a id="l00904" name="l00904"></a><span class="lineno">  904</span>      <span class="comment">// We are in thread Ws (unspecified; really Server_session worker thread).</span></div>
<div class="line"><a id="l00905" name="l00905"></a><span class="lineno">  905</span> </div>
<div class="line"><a id="l00906" name="l00906"></a><span class="lineno">  906</span>      <span class="keyword">auto</span> incomplete_session = incomplete_session_observer.lock();</div>
<div class="line"><a id="l00907" name="l00907"></a><span class="lineno">  907</span>      <span class="keywordflow">if</span> (incomplete_session)</div>
<div class="line"><a id="l00908" name="l00908"></a><span class="lineno">  908</span>      {</div>
<div class="line"><a id="l00909" name="l00909"></a><span class="lineno">  909</span>        <span class="comment">/* No matter what -- the session is no longer incomplete; either it accepted log-in in OK or not.</span></div>
<div class="line"><a id="l00910" name="l00910"></a><span class="lineno">  910</span><span class="comment">         * Remove it from *this.  We&#39;ll either forget it (error) or give it to user (otherwise).  Anyway remove it. */</span></div>
<div class="line"><a id="l00911" name="l00911"></a><span class="lineno">  911</span>        {</div>
<div class="line"><a id="l00912" name="l00912"></a><span class="lineno">  912</span>          <a class="code hl_typedef" href="classipc_1_1session_1_1Session__server__impl.html#a5e864e857a767101ed964f532b06acd4">Lock_guard</a> incomplete_sessions_lock(m_state-&gt;m_mutex);</div>
<div class="line"><a id="l00913" name="l00913"></a><span class="lineno">  913</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00914" name="l00914"></a><span class="lineno">  914</span>          <span class="keyword">const</span> <span class="keywordtype">bool</span> erased_ok = 1 ==</div>
<div class="line"><a id="l00915" name="l00915"></a><span class="lineno">  915</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00916" name="l00916"></a><span class="lineno">  916</span>          m_state-&gt;m_incomplete_sessions.erase(incomplete_session);</div>
<div class="line"><a id="l00917" name="l00917"></a><span class="lineno">  917</span>          assert(erased_ok &amp;&amp; <span class="stringliteral">&quot;Who else would have erased it?!&quot;</span>);</div>
<div class="line"><a id="l00918" name="l00918"></a><span class="lineno">  918</span>        }</div>
<div class="line"><a id="l00919" name="l00919"></a><span class="lineno">  919</span> </div>
<div class="line"><a id="l00920" name="l00920"></a><span class="lineno">  920</span>        <span class="keywordflow">if</span> (async_err_code)</div>
<div class="line"><a id="l00921" name="l00921"></a><span class="lineno">  921</span>        {</div>
<div class="line"><a id="l00922" name="l00922"></a><span class="lineno">  922</span>          <span class="comment">/* See class doc header.  We are in thread Ws; letting incomplete_session (the shared_ptr) be destroyed</span></div>
<div class="line"><a id="l00923" name="l00923"></a><span class="lineno">  923</span><span class="comment">           * here (below, in the `if (async_err_code)` clause) would cause it to try</span></div>
<div class="line"><a id="l00924" name="l00924"></a><span class="lineno">  924</span><span class="comment">           * to join thread Ws which would deadlock; we&#39;d be breaking the contract to</span></div>
<div class="line"><a id="l00925" name="l00925"></a><span class="lineno">  925</span><span class="comment">           * never destroy Server_session from its own handler.  So hand it off to this very-idle thread to do it</span></div>
<div class="line"><a id="l00926" name="l00926"></a><span class="lineno">  926</span><span class="comment">           * asynchronously. */</span></div>
<div class="line"><a id="l00927" name="l00927"></a><span class="lineno">  927</span>          m_state-&gt;m_incomplete_session_graveyard-&gt;post([incomplete_session = std::move(incomplete_session)]</div>
<div class="line"><a id="l00928" name="l00928"></a><span class="lineno">  928</span>                                                          () <span class="keyword">mutable</span></div>
<div class="line"><a id="l00929" name="l00929"></a><span class="lineno">  929</span>          {</div>
<div class="line"><a id="l00930" name="l00930"></a><span class="lineno">  930</span>            <span class="comment">// That&#39;s that.  ~Server_session() will run here:</span></div>
<div class="line"><a id="l00931" name="l00931"></a><span class="lineno">  931</span>            incomplete_session.reset(); <span class="comment">// Just in case compiler wants to warn about unused-var or optimize it away...?</span></div>
<div class="line"><a id="l00932" name="l00932"></a><span class="lineno">  932</span>          });</div>
<div class="line"><a id="l00933" name="l00933"></a><span class="lineno">  933</span>          <span class="comment">// incomplete_session (the shared_ptr) is hosed at this point.</span></div>
<div class="line"><a id="l00934" name="l00934"></a><span class="lineno">  934</span>          assert((!incomplete_session) &amp;&amp; <span class="stringliteral">&quot;It should&#39;ve been nullified by being moved-from into the captures.&quot;</span>);</div>
<div class="line"><a id="l00935" name="l00935"></a><span class="lineno">  935</span>        } <span class="comment">// if (async_err_code)</span></div>
<div class="line"><a id="l00936" name="l00936"></a><span class="lineno">  936</span>      } <span class="comment">// if (incomplete_session) (but it may have been nullified inside &lt;=&gt; async_err_code is truthy)</span></div>
<div class="line"><a id="l00937" name="l00937"></a><span class="lineno">  937</span>      <span class="keywordflow">else</span> <span class="comment">// if (!incomplete_session)</span></div>
<div class="line"><a id="l00938" name="l00938"></a><span class="lineno">  938</span>      {</div>
<div class="line"><a id="l00939" name="l00939"></a><span class="lineno">  939</span>        <span class="comment">/* Server_session_dtl disappeared under us, because *this is disappearing under us.</span></div>
<div class="line"><a id="l00940" name="l00940"></a><span class="lineno">  940</span><span class="comment">         * Naturally no need to remove it from any m_incomplete_sessions, since that&#39;s not a thing.</span></div>
<div class="line"><a id="l00941" name="l00941"></a><span class="lineno">  941</span><span class="comment">         * However this sanity check is worthwhile: */</span></div>
<div class="line"><a id="l00942" name="l00942"></a><span class="lineno">  942</span>        assert((async_err_code == <a class="code hl_enumvalue" href="namespaceipc_1_1session_1_1error.html#a0708d4bec9ae853f4d7e3d7822fc8f2fafe29343445a7bf167cc186a44bd2c6ed">error::Code::S_OBJECT_SHUTDOWN_ABORTED_COMPLETION_HANDLER</a>)</div>
<div class="line"><a id="l00943" name="l00943"></a><span class="lineno">  943</span>               &amp;&amp; <span class="stringliteral">&quot;The incomplete-session Server_session_dtl can only disappear under us if *this is destroyed &quot;</span></div>
<div class="line"><a id="l00944" name="l00944"></a><span class="lineno">  944</span>                    <span class="stringliteral">&quot;which can only occur &lt;=&gt; operation-aborted is emitted due to *this destruction destroying that &quot;</span></div>
<div class="line"><a id="l00945" name="l00945"></a><span class="lineno">  945</span>                    <span class="stringliteral">&quot;incomplete-session.&quot;</span>);</div>
<div class="line"><a id="l00946" name="l00946"></a><span class="lineno">  946</span>      } <span class="comment">// else if (!incomplete_session)</span></div>
<div class="line"><a id="l00947" name="l00947"></a><span class="lineno">  947</span> </div>
<div class="line"><a id="l00948" name="l00948"></a><span class="lineno">  948</span>      <span class="keywordflow">if</span> (async_err_code)</div>
<div class="line"><a id="l00949" name="l00949"></a><span class="lineno">  949</span>      {</div>
<div class="line"><a id="l00950" name="l00950"></a><span class="lineno">  950</span>        <span class="comment">/* As in the acceptor failure case above just forward it to handler.  All the same comments apply,</span></div>
<div class="line"><a id="l00951" name="l00951"></a><span class="lineno">  951</span><span class="comment">         * except there is no subtlety about operation-aborted coming from outside ipc::session.</span></div>
<div class="line"><a id="l00952" name="l00952"></a><span class="lineno">  952</span><span class="comment">         * If you change this, please consider synchronizing with the async_accept() handler above. */</span></div>
<div class="line"><a id="l00953" name="l00953"></a><span class="lineno">  953</span>        on_done_func(async_err_code);</div>
<div class="line"><a id="l00954" name="l00954"></a><span class="lineno">  954</span>        <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00955" name="l00955"></a><span class="lineno">  955</span>      }</div>
<div class="line"><a id="l00956" name="l00956"></a><span class="lineno">  956</span>      <span class="comment">// else if (!async_err_code)</span></div>
<div class="line"><a id="l00957" name="l00957"></a><span class="lineno">  957</span>      assert(incomplete_session);</div>
<div class="line"><a id="l00958" name="l00958"></a><span class="lineno">  958</span> </div>
<div class="line"><a id="l00959" name="l00959"></a><span class="lineno">  959</span>      <span class="comment">// Yay!  Give it to the user.</span></div>
<div class="line"><a id="l00960" name="l00960"></a><span class="lineno">  960</span>      FLOW_LOG_INFO(<span class="stringliteral">&quot;Session acceptor [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Async-accept request: Successfully resulted in logged-in &quot;</span></div>
<div class="line"><a id="l00961" name="l00961"></a><span class="lineno">  961</span>                    <span class="stringliteral">&quot;server session [&quot;</span> &lt;&lt; *incomplete_session &lt;&lt; <span class="stringliteral">&quot;].  Feeding to user via callback.&quot;</span>);</div>
<div class="line"><a id="l00962" name="l00962"></a><span class="lineno">  962</span> </div>
<div class="line"><a id="l00963" name="l00963"></a><span class="lineno">  963</span>      <span class="comment">/* Server_session_dtl *is* Server_session, just with an added public API; now we reinterpret the pointer</span></div>
<div class="line"><a id="l00964" name="l00964"></a><span class="lineno">  964</span><span class="comment">       * and give the user the Server_session without that public API which accesses its internals. */</span></div>
<div class="line"><a id="l00965" name="l00965"></a><span class="lineno">  965</span>      *target_session = std::move(*(<span class="keyword">static_cast&lt;</span><a class="code hl_class" href="classServer__session__t.html">Server_session_obj</a>*<span class="keyword">&gt;</span>(incomplete_session.get())));</div>
<div class="line"><a id="l00966" name="l00966"></a><span class="lineno">  966</span>      <span class="comment">// *incomplete_session is now as-if default-cted.</span></div>
<div class="line"><a id="l00967" name="l00967"></a><span class="lineno">  967</span> </div>
<div class="line"><a id="l00968" name="l00968"></a><span class="lineno">  968</span>      on_done_func(async_err_code); <span class="comment">// Pass in Error_code().</span></div>
<div class="line"><a id="l00969" name="l00969"></a><span class="lineno">  969</span>      FLOW_LOG_TRACE(<span class="stringliteral">&quot;Handler finished.&quot;</span>);</div>
<div class="line"><a id="l00970" name="l00970"></a><span class="lineno">  970</span>    }); <span class="comment">// incomplete_session-&gt;async_accept_log_in()</span></div>
<div class="line"><a id="l00971" name="l00971"></a><span class="lineno">  971</span>  }); <span class="comment">// m_master_sock_acceptor-&gt;async_accept()</span></div>
<div class="line"><a id="l00972" name="l00972"></a><span class="lineno">  972</span>} <span class="comment">// Session_server_impl::async_accept()</span></div>
<div class="line"><a id="l00973" name="l00973"></a><span class="lineno">  973</span> </div>
<div class="line"><a id="l00974" name="l00974"></a><span class="lineno">  974</span><a class="code hl_define" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div>
<div class="line"><a id="l00975" name="l00975"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a2a3c0c330d477176b714a9920196775d">  975</a></span><span class="keywordtype">void</span> CLASS_SESSION_SERVER_IMPL::to_ostream(std::ostream* os)<span class="keyword"> const</span></div>
<div class="line"><a id="l00976" name="l00976"></a><span class="lineno">  976</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00977" name="l00977"></a><span class="lineno">  977</span>  *os &lt;&lt; <span class="charliteral">&#39;[&#39;</span> &lt;&lt; m_srv_app_ref &lt;&lt; <span class="stringliteral">&quot;]@&quot;</span> &lt;&lt; <span class="keyword">static_cast&lt;</span><span class="keyword">const </span><span class="keywordtype">void</span>*<span class="keyword">&gt;</span>(<span class="keyword">this</span>);</div>
<div class="line"><a id="l00978" name="l00978"></a><span class="lineno">  978</span>}</div>
<div class="line"><a id="l00979" name="l00979"></a><span class="lineno">  979</span> </div>
<div class="line"><a id="l00980" name="l00980"></a><span class="lineno">  980</span><a class="code hl_define" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div>
<div class="line"><a id="l00981" name="l00981"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#ad7cd4d77db826af9fe39c17e8ee7ca37">  981</a></span><span class="keyword">typename</span> CLASS_SESSION_SERVER_IMPL::Session_server_obj* CLASS_SESSION_SERVER_IMPL::this_session_srv()</div>
<div class="line"><a id="l00982" name="l00982"></a><span class="lineno">  982</span>{</div>
<div class="line"><a id="l00983" name="l00983"></a><span class="lineno">  983</span>  <span class="keywordflow">return</span> m_this_session_srv;</div>
<div class="line"><a id="l00984" name="l00984"></a><span class="lineno">  984</span>}</div>
<div class="line"><a id="l00985" name="l00985"></a><span class="lineno">  985</span> </div>
<div class="line"><a id="l00986" name="l00986"></a><span class="lineno">  986</span><a class="code hl_define" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div>
<div class="line"><a id="l00987" name="l00987"></a><span class="lineno">  987</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Task&gt;</div>
<div class="line"><a id="l00988" name="l00988"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a40fca0b878f9150f5f7db55768da45ad">  988</a></span><span class="keywordtype">void</span> CLASS_SESSION_SERVER_IMPL::sub_class_set_deinit_func(<a class="code hl_typedef" href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">Task</a>&amp;&amp; task)</div>
<div class="line"><a id="l00989" name="l00989"></a><span class="lineno">  989</span>{</div>
<div class="line"><a id="l00990" name="l00990"></a><span class="lineno">  990</span>  m_deinit_func_or_empty = std::move(task);</div>
<div class="line"><a id="l00991" name="l00991"></a><span class="lineno">  991</span>}</div>
<div class="line"><a id="l00992" name="l00992"></a><span class="lineno">  992</span> </div>
<div class="line"><a id="l00993" name="l00993"></a><span class="lineno">  993</span><a class="code hl_define" href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div>
<div class="line"><a id="l00994" name="l00994"></a><span class="lineno"><a class="line" href="classipc_1_1session_1_1Session__server__impl.html#a5fc42e333522f7b1ed11fbff4ae72e5c">  994</a></span>std::ostream&amp; <a class="code hl_function" href="namespaceipc_1_1session.html#a6b2f9a90ac9cc5098d9b90e7f547c97e">operator&lt;&lt;</a>(std::ostream&amp; os,</div>
<div class="line"><a id="l00995" name="l00995"></a><span class="lineno">  995</span>                         <span class="keyword">const</span> <a class="code hl_define" href="session__server__impl_8hpp.html#afb6afd5f56bebcabd155f3c1def7f180">CLASS_SESSION_SERVER_IMPL</a>&amp; val)</div>
<div class="line"><a id="l00996" name="l00996"></a><span class="lineno">  996</span>{</div>
<div class="line"><a id="l00997" name="l00997"></a><span class="lineno">  997</span>  val.to_ostream(&amp;os);</div>
<div class="line"><a id="l00998" name="l00998"></a><span class="lineno">  998</span>  <span class="keywordflow">return</span> os;</div>
<div class="line"><a id="l00999" name="l00999"></a><span class="lineno">  999</span>}</div>
<div class="line"><a id="l01000" name="l01000"></a><span class="lineno"> 1000</span> </div>
<div class="line"><a id="l01001" name="l01001"></a><span class="lineno"> 1001</span><span class="preprocessor">#undef CLASS_SESSION_SERVER_IMPL</span></div>
<div class="line"><a id="l01002" name="l01002"></a><span class="lineno"> 1002</span><span class="preprocessor">#undef TEMPLATE_SESSION_SERVER_IMPL</span></div>
<div class="line"><a id="l01003" name="l01003"></a><span class="lineno"> 1003</span> </div>
<div class="line"><a id="l01004" name="l01004"></a><span class="lineno"> 1004</span>} <span class="comment">// namespace ipc::session</span></div>
<div class="ttc" id="aapp_8hpp_html"><div class="ttname"><a href="app_8hpp.html">app.hpp</a></div></div>
<div class="ttc" id="ablob__stream__mq_8hpp_html"><div class="ttname"><a href="blob__stream__mq_8hpp.html">blob_stream_mq.hpp</a></div></div>
<div class="ttc" id="aclassServer__session__t_html"><div class="ttname"><a href="classServer__session__t.html">Server_session_t</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Server__session__dtl_html"><div class="ttname"><a href="classipc_1_1session_1_1Server__session__dtl.html">ipc::session::Server_session_dtl</a></div><div class="ttdoc">This is the data-less sub-class of Server_session or any more-advanced (e.g., SHM-capable) variant th...</div><div class="ttdef"><b>Definition:</b> <a href="server__session__dtl_8hpp_source.html#l00037">server_session_dtl.hpp:39</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Server__session__dtl_html_ae91b835b0f82f071d695f9ae62ad9174"><div class="ttname"><a href="classipc_1_1session_1_1Server__session__dtl.html#ae91b835b0f82f071d695f9ae62ad9174">ipc::session::Server_session_dtl::base</a></div><div class="ttdeci">const Session_base_obj &amp; base() const</div><div class="ttdoc">Provides const access to Session_base super-object.</div><div class="ttdef"><b>Definition:</b> <a href="server__session__dtl_8hpp_source.html#l00151">server_session_dtl.hpp:151</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Server__session__mv_html"><div class="ttname"><a href="classipc_1_1session_1_1Server__session__mv.html">ipc::session::Server_session_mv&lt; Server_session_impl&lt; S_MQ_TYPE_OR_NONE, S_TRANSMIT_NATIVE_HANDLES, Mdt_payload &gt; &gt;</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html">ipc::session::Session_server_impl</a></div><div class="ttdoc">Internal class template comprising API/logic common to every Session_server variant,...</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00143">session_server_impl.hpp:146</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a2a3c0c330d477176b714a9920196775d"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a2a3c0c330d477176b714a9920196775d">ipc::session::Session_server_impl::to_ostream</a></div><div class="ttdeci">void to_ostream(std::ostream *os) const</div><div class="ttdoc">See Server_session method.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00975">session_server_impl.hpp:975</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a3a608ab714f6a6725e6122470d87713f"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a3a608ab714f6a6725e6122470d87713f">ipc::session::Session_server_impl::Incomplete_session</a></div><div class="ttdeci">boost::shared_ptr&lt; Server_session_dtl_obj &gt; Incomplete_session</div><div class="ttdoc">Internally used ref-counted handle to a Server_session_dtl_obj, suitable for capturing and passing ar...</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00335">session_server_impl.hpp:335</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a40fca0b878f9150f5f7db55768da45ad"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a40fca0b878f9150f5f7db55768da45ad">ipc::session::Session_server_impl::sub_class_set_deinit_func</a></div><div class="ttdeci">void sub_class_set_deinit_func(Task &amp;&amp;task)</div><div class="ttdoc">Utility for sub-classes: ensures that task() is invoked near the end of *this dtor's execution,...</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00988">session_server_impl.hpp:988</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a47625f247dea35cf276d31c039c6bf0c"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a47625f247dea35cf276d31c039c6bf0c">ipc::session::Session_server_impl::Session_server_obj</a></div><div class="ttdeci">Session_server_t Session_server_obj</div><div class="ttdoc">See this_session_srv().</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00151">session_server_impl.hpp:151</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a5286c0f847ccf7e62d87c088e7be32e0"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a5286c0f847ccf7e62d87c088e7be32e0">ipc::session::Session_server_impl::Incomplete_sessions</a></div><div class="ttdeci">boost::unordered_set&lt; Incomplete_session &gt; Incomplete_sessions</div><div class="ttdoc">Short-hand for set of Incomplete_session, with fast insertion and removal by key Incomplete_session i...</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00344">session_server_impl.hpp:344</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a5e864e857a767101ed964f532b06acd4"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a5e864e857a767101ed964f532b06acd4">ipc::session::Session_server_impl::Lock_guard</a></div><div class="ttdeci">flow::util::Lock_guard&lt; Mutex &gt; Lock_guard</div><div class="ttdoc">Short-hand for Mutex lock.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00350">session_server_impl.hpp:350</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a60ec88b23d73c354959a1e11636dc717"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a60ec88b23d73c354959a1e11636dc717">ipc::session::Session_server_impl::async_accept</a></div><div class="ttdeci">void async_accept(Server_session_obj *target_session, Channels *init_channels_by_srv_req, Mdt_reader_ptr *mdt_from_cli_or_null, Channels *init_channels_by_cli_req, N_init_channels_by_srv_req_func &amp;&amp;n_init_channels_by_srv_req_func, Mdt_load_func &amp;&amp;mdt_load_func, Task_err &amp;&amp;on_done_func)</div><div class="ttdoc">See Session_server method.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00747">session_server_impl.hpp:747</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a798164cc2876cfaddf8793bd346d13f9"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a798164cc2876cfaddf8793bd346d13f9">ipc::session::Session_server_impl::m_cli_app_master_set_ref</a></div><div class="ttdeci">const Client_app::Master_set &amp; m_cli_app_master_set_ref</div><div class="ttdoc">See ctor.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00413">session_server_impl.hpp:413</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a7be0cca184cdba62b9748e0ca37b8b17"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a7be0cca184cdba62b9748e0ca37b8b17">ipc::session::Session_server_impl::m_srv_app_ref</a></div><div class="ttdeci">const Server_app &amp; m_srv_app_ref</div><div class="ttdoc">See Session_server public data member.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00285">session_server_impl.hpp:285</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a86de1d5b7cae35d89827c3235e2b8d89"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a86de1d5b7cae35d89827c3235e2b8d89">ipc::session::Session_server_impl::Mdt_reader_ptr</a></div><div class="ttdeci">typename Server_session_obj::Mdt_reader_ptr Mdt_reader_ptr</div><div class="ttdoc">Short-hand for Session_mv::Mdt_reader_ptr.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00157">session_server_impl.hpp:157</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a98165f48041d5a2846c7ac574833b933"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a98165f48041d5a2846c7ac574833b933">ipc::session::Session_server_impl::m_deinit_func_or_empty</a></div><div class="ttdeci">Function&lt; void()&gt; m_deinit_func_or_empty</div><div class="ttdoc">See sub_class_set_deinit_func(). .empty() unless that was called at least once.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00422">session_server_impl.hpp:422</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a9ad5c6cbb1c9378d42ec5cd909389dc2"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a9ad5c6cbb1c9378d42ec5cd909389dc2">ipc::session::Session_server_impl::Channels</a></div><div class="ttdeci">typename Server_session_obj::Channels Channels</div><div class="ttdoc">Short-hand for Session_mv::Channels.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00160">session_server_impl.hpp:160</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_a9bf4d5502b41c98a98fee4cc3c2f2530"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#a9bf4d5502b41c98a98fee4cc3c2f2530">ipc::session::Session_server_impl::Session_server_impl</a></div><div class="ttdeci">Session_server_impl(flow::log::Logger *logger_ptr, Session_server_obj *this_session_srv_arg, const Server_app &amp;srv_app_ref, const Client_app::Master_set &amp;cli_app_master_set_ref, Error_code *err_code, Per_app_setup_func &amp;&amp;per_app_setup_func)</div><div class="ttdoc">See Session_server ctor; it does that.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00438">session_server_impl.hpp:439</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_aa7aed6de161203a2e7414411fa1defa5"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#aa7aed6de161203a2e7414411fa1defa5">ipc::session::Session_server_impl::m_this_session_srv</a></div><div class="ttdeci">Session_server_obj *const m_this_session_srv</div><div class="ttdoc">See this_session_srv().</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00410">session_server_impl.hpp:410</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_ac49be718ad86c3919563da57502d11b3"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#ac49be718ad86c3919563da57502d11b3">ipc::session::Session_server_impl::m_state</a></div><div class="ttdeci">std::optional&lt; State &gt; m_state</div><div class="ttdoc">See State.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00419">session_server_impl.hpp:419</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_ad7cd4d77db826af9fe39c17e8ee7ca37"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#ad7cd4d77db826af9fe39c17e8ee7ca37">ipc::session::Session_server_impl::this_session_srv</a></div><div class="ttdeci">Session_server_obj * this_session_srv()</div><div class="ttdoc">Returns pointer to the object that is privately sub-classing us.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00981">session_server_impl.hpp:981</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_adc97c8fd3c5860dc6164f0a384b9fe03"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#adc97c8fd3c5860dc6164f0a384b9fe03">ipc::session::Session_server_impl::m_per_app_setup_func</a></div><div class="ttdeci">const Function&lt; Error_code(const Client_app &amp;client_app)&gt; m_per_app_setup_func</div><div class="ttdoc">See ctor.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00416">session_server_impl.hpp:416</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_ae4388def520aad700a3fcdfc95b6f24e"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#ae4388def520aad700a3fcdfc95b6f24e">ipc::session::Session_server_impl::~Session_server_impl</a></div><div class="ttdeci">~Session_server_impl()</div><div class="ttdoc">See Session_server dtor.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00716">session_server_impl.hpp:716</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_ae66f28a17f3cdd72d97212126483650a"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#ae66f28a17f3cdd72d97212126483650a">ipc::session::Session_server_impl::Incomplete_session_observer</a></div><div class="ttdeci">boost::weak_ptr&lt; Server_session_dtl_obj &gt; Incomplete_session_observer</div><div class="ttdoc">weak_ptr observer of an Incomplete_session.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00341">session_server_impl.hpp:341</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server__impl_html_ae7f35b32be309d354044662f0e17a891"><div class="ttname"><a href="classipc_1_1session_1_1Session__server__impl.html#ae7f35b32be309d354044662f0e17a891">ipc::session::Session_server_impl::Mutex</a></div><div class="ttdeci">flow::util::Mutex_non_recursive Mutex</div><div class="ttdoc">Short-hand for State::m_mutex type.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00347">session_server_impl.hpp:347</a></div></div>
<div class="ttc" id="aclassipc_1_1session_1_1Session__server_html"><div class="ttname"><a href="classipc_1_1session_1_1Session__server.html">ipc::session::Session_server</a></div><div class="ttdoc">To be instantiated typically once in a given process, an object of this type asynchronously listens f...</div><div class="ttdef"><b>Definition:</b> <a href="ipc__session_2src_2ipc_2session_2session__server_8hpp_source.html#l00193">session_server.hpp:197</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Blob__stream__mq__base_html"><div class="ttname"><a href="classipc_1_1transport_1_1Blob__stream__mq__base.html">ipc::transport::Blob_stream_mq_base</a></div><div class="ttdoc">Base of Blob_stream_mq_sender and Blob_stream_mq_receiver containing certain static facilities,...</div><div class="ttdef"><b>Definition:</b> <a href="blob__stream__mq_8hpp_source.html#l00036">blob_stream_mq.hpp:37</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_html"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html">ipc::transport::sync_io::Native_socket_stream</a></div><div class="ttdoc">Implements both sync_io::Native_handle_sender and sync_io::Native_handle_receiver concepts by using a...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2native__socket__stream_8hpp_source.html#l00150">native_socket_stream.hpp:151</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html">ipc::util::Process_credentials</a></div><div class="ttdoc">A process's credentials (PID, UID, GID as of this writing).</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8hpp_source.html#l00038">process_credentials.hpp:39</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Shared__name_html"><div class="ttname"><a href="classipc_1_1util_1_1Shared__name.html">ipc::util::Shared_name</a></div><div class="ttdoc">String-wrapping abstraction representing a name uniquely distinguishing a kernel-persistent entity fr...</div><div class="ttdef"><b>Definition:</b> <a href="shared__name_8hpp_source.html#l00241">shared_name.hpp:242</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Shared__name_html_a48f20b7b54490aa10dc64081d34c55b2"><div class="ttname"><a href="classipc_1_1util_1_1Shared__name.html#a48f20b7b54490aa10dc64081d34c55b2">ipc::util::Shared_name::ct</a></div><div class="ttdeci">static Shared_name ct(const Source &amp;src)</div><div class="ttdoc">Copy-constructs from a char-sequence container (including string, util::String_view,...</div><div class="ttdef"><b>Definition:</b> <a href="shared__name_8hpp_source.html#l00674">shared_name.hpp:674</a></div></div>
<div class="ttc" id="adetail_2session__fwd_8hpp_html"><div class="ttname"><a href="detail_2session__fwd_8hpp.html">session_fwd.hpp</a></div></div>
<div class="ttc" id="aipc__core_2src_2ipc_2transport_2error_8hpp_html"><div class="ttname"><a href="ipc__core_2src_2ipc_2transport_2error_8hpp.html">error.hpp</a></div></div>
<div class="ttc" id="aipc__session_2src_2ipc_2session_2error_8hpp_html"><div class="ttname"><a href="ipc__session_2src_2ipc_2session_2error_8hpp.html">error.hpp</a></div></div>
<div class="ttc" id="anamespaceipc_1_1session_1_1error_html_a0708d4bec9ae853f4d7e3d7822fc8f2fa5c437fa266aea0c8e2b348ee84dd61fa"><div class="ttname"><a href="namespaceipc_1_1session_1_1error.html#a0708d4bec9ae853f4d7e3d7822fc8f2fa5c437fa266aea0c8e2b348ee84dd61fa">ipc::session::error::Code::S_RESOURCE_OWNER_UNEXPECTED</a></div><div class="ttdeci">@ S_RESOURCE_OWNER_UNEXPECTED</div><div class="ttdoc">A resource in the file system (file, SHM pool, MQ, etc.) has or could have unexpected owner; ipc::ses...</div></div>
<div class="ttc" id="anamespaceipc_1_1session_1_1error_html_a0708d4bec9ae853f4d7e3d7822fc8f2fa7300721595cc25baa9a9e43bd76296aa"><div class="ttname"><a href="namespaceipc_1_1session_1_1error.html#a0708d4bec9ae853f4d7e3d7822fc8f2fa7300721595cc25baa9a9e43bd76296aa">ipc::session::error::Code::S_MUTEX_BIPC_MISC_LIBRARY_ERROR</a></div><div class="ttdeci">@ S_MUTEX_BIPC_MISC_LIBRARY_ERROR</div><div class="ttdoc">Low-level boost.ipc.mutex: boost.interprocess emitted miscellaneous library exception sans a system c...</div></div>
<div class="ttc" id="anamespaceipc_1_1session_1_1error_html_a0708d4bec9ae853f4d7e3d7822fc8f2fafe29343445a7bf167cc186a44bd2c6ed"><div class="ttname"><a href="namespaceipc_1_1session_1_1error.html#a0708d4bec9ae853f4d7e3d7822fc8f2fafe29343445a7bf167cc186a44bd2c6ed">ipc::session::error::Code::S_OBJECT_SHUTDOWN_ABORTED_COMPLETION_HANDLER</a></div><div class="ttdeci">@ S_OBJECT_SHUTDOWN_ABORTED_COMPLETION_HANDLER</div><div class="ttdoc">Async completion handler is being called prematurely, because underlying object is shutting down,...</div></div>
<div class="ttc" id="anamespaceipc_1_1session_html"><div class="ttname"><a href="namespaceipc_1_1session.html">ipc::session</a></div><div class="ttdoc">Flow-IPC module providing the broad lifecycle and shared-resource organization – via the session conc...</div><div class="ttdef"><b>Definition:</b> <a href="app_8cpp_source.html#l00026">app.cpp:27</a></div></div>
<div class="ttc" id="anamespaceipc_1_1session_html_a0eac87b284d50832334d819a8877cbaa"><div class="ttname"><a href="namespaceipc_1_1session.html#a0eac87b284d50832334d819a8877cbaa">ipc::session::ensure_resource_owner_is_app</a></div><div class="ttdeci">void ensure_resource_owner_is_app(flow::log::Logger *logger_ptr, const fs::path &amp;path, const App &amp;app, Error_code *err_code)</div><div class="ttdoc">Utility, used internally but exposed in public API in case it is of general use, that checks that the...</div><div class="ttdef"><b>Definition:</b> <a href="app_8cpp_source.html#l00031">app.cpp:31</a></div></div>
<div class="ttc" id="anamespaceipc_1_1session_html_a5216d618bb573e68276d2933ce3f4010"><div class="ttname"><a href="namespaceipc_1_1session.html#a5216d618bb573e68276d2933ce3f4010">ipc::session::build_conventional_shared_name_prefix</a></div><div class="ttdeci">Shared_name build_conventional_shared_name_prefix(const Shared_name &amp;resource_type, const Shared_name &amp;srv_app_name)</div><div class="ttdoc">Return the prefix common to all calls to either build_conventional_shared_name() overload with the ar...</div><div class="ttdef"><b>Definition:</b> <a href="ipc__session_2src_2ipc_2session_2detail_2session__shared__name_8cpp_source.html#l00093">session_shared_name.cpp:93</a></div></div>
<div class="ttc" id="anamespaceipc_1_1session_html_a6b2f9a90ac9cc5098d9b90e7f547c97e"><div class="ttname"><a href="namespaceipc_1_1session.html#a6b2f9a90ac9cc5098d9b90e7f547c97e">ipc::session::operator&lt;&lt;</a></div><div class="ttdeci">std::ostream &amp; operator&lt;&lt;(std::ostream &amp;os, const App &amp;val)</div><div class="ttdoc">Prints string representation of the given App to the given ostream.</div><div class="ttdef"><b>Definition:</b> <a href="app_8cpp_source.html#l00124">app.cpp:124</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297afe29343445a7bf167cc186a44bd2c6ed"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297afe29343445a7bf167cc186a44bd2c6ed">ipc::transport::error::Code::S_OBJECT_SHUTDOWN_ABORTED_COMPLETION_HANDLER</a></div><div class="ttdeci">@ S_OBJECT_SHUTDOWN_ABORTED_COMPLETION_HANDLER</div><div class="ttdoc">Async completion handler is being called prematurely, because underlying object is shutting down,...</div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a31e67d3a017477a04b313927e2f2c733"><div class="ttname"><a href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">ipc::util::Task</a></div><div class="ttdeci">flow::async::Task Task</div><div class="ttdoc">Short-hand for polymorphic function (a-la std::function&lt;&gt;) that takes no arguments and returns nothin...</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00122">util_fwd.hpp:122</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a5664539b3d75d6d10cdfebf6eac5382d"><div class="ttname"><a href="namespaceipc_1_1util.html#a5664539b3d75d6d10cdfebf6eac5382d">ipc::util::OPEN_OR_CREATE</a></div><div class="ttdeci">const Open_or_create OPEN_OR_CREATE</div><div class="ttdoc">Tag value indicating an open-if-exists-else-create operation.</div><div class="ttdef"><b>Definition:</b> <a href="ipc__core_2src_2ipc_2util_2util_8cpp_source.html#l00030">util.cpp:30</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_aa74a8b46a5b38021c662a0b3bdfb46bf"><div class="ttname"><a href="namespaceipc_1_1util.html#aa74a8b46a5b38021c662a0b3bdfb46bf">ipc::util::PRODUCER_CONSUMER_RESOURCE_PERMISSIONS_LVL_MAP</a></div><div class="ttdeci">const boost::array&lt; Permissions, size_t(Permissions_level::S_END_SENTINEL)&gt; PRODUCER_CONSUMER_RESOURCE_PERMISSIONS_LVL_MAP</div><div class="ttdoc">Maps general Permissions_level specifier to low-level Permissions value, when the underlying resource...</div><div class="ttdef"><b>Definition:</b> <a href="ipc__core_2src_2ipc_2util_2detail_2util_8cpp_source.html#l00041">util.cpp:42</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_abbba79fcaee378f433e7ce3093e5c435"><div class="ttname"><a href="namespaceipc_1_1util.html#abbba79fcaee378f433e7ce3093e5c435">ipc::util::set_resource_permissions</a></div><div class="ttdeci">void set_resource_permissions(flow::log::Logger *logger_ptr, const fs::path &amp;path, const Permissions &amp;perms, Error_code *err_code)</div><div class="ttdoc">Utility that sets the permissions of the given resource (at the supplied file system path) to specifi...</div><div class="ttdef"><b>Definition:</b> <a href="ipc__core_2src_2ipc_2util_2util_8cpp_source.html#l00046">util.cpp:46</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_abd43da87aa17031604c7906757c07d46"><div class="ttname"><a href="namespaceipc_1_1util.html#abd43da87aa17031604c7906757c07d46">ipc::util::op_with_possible_bipc_exception</a></div><div class="ttdeci">void op_with_possible_bipc_exception(flow::log::Logger *logger_ptr, Error_code *err_code, const Error_code &amp;misc_bipc_lib_error, String_view context, const Func &amp;func)</div><div class="ttdoc">Internal (to ipc) utility that invokes the given function that invokes a boost.interprocess operation...</div><div class="ttdef"><b>Definition:</b> <a href="util_8hpp_source.html#l00034">util.hpp:34</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_abda2ce5bcdbc26ca63d667b87818439c"><div class="ttname"><a href="namespaceipc_1_1util.html#abda2ce5bcdbc26ca63d667b87818439c">ipc::util::shared_resource_permissions</a></div><div class="ttdeci">Permissions shared_resource_permissions(Permissions_level permissions_lvl)</div><div class="ttdoc">Maps general Permissions_level specifier to low-level Permissions value, when the underlying resource...</div><div class="ttdef"><b>Definition:</b> <a href="ipc__core_2src_2ipc_2util_2util_8cpp_source.html#l00037">util.cpp:37</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_ae6ac47812a90d1287c61e0b7de7bc4f5"><div class="ttname"><a href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">ipc::util::String_view</a></div><div class="ttdeci">flow::util::String_view String_view</div><div class="ttdoc">Short-hand for Flow's String_view.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00115">util_fwd.hpp:115</a></div></div>
<div class="ttc" id="anamespaceipc_html_a4ccdeed058222c635745a4dc830e99f7"><div class="ttname"><a href="namespaceipc.html#a4ccdeed058222c635745a4dc830e99f7">ipc::Log_component</a></div><div class="ttdeci">Log_component</div><div class="ttdoc">The flow::log::Component payload enumeration containing various log components used by Flow-IPC inter...</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00322">common.hpp:323</a></div></div>
<div class="ttc" id="anamespaceipc_html_aa3192e586cc45d3e7c22463bf2760f89"><div class="ttname"><a href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">ipc::Error_code</a></div><div class="ttdeci">flow::Error_code Error_code</div><div class="ttdoc">Short-hand for flow::Error_code which is very common.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00298">common.hpp:298</a></div></div>
<div class="ttc" id="anamespaceipc_html_aa455c7f045059736578ca275fc1a851f"><div class="ttname"><a href="namespaceipc.html#aa455c7f045059736578ca275fc1a851f">ipc::Function</a></div><div class="ttdeci">flow::Function&lt; Signature &gt; Function</div><div class="ttdoc">Short-hand for polymorphic functor holder which is very common. This is essentially std::function.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00302">common.hpp:302</a></div></div>
<div class="ttc" id="anative__socket__stream__acceptor_8hpp_html"><div class="ttname"><a href="native__socket__stream__acceptor_8hpp.html">native_socket_stream_acceptor.hpp</a></div></div>
<div class="ttc" id="aserver__session__dtl_8hpp_html"><div class="ttname"><a href="server__session__dtl_8hpp.html">server_session_dtl.hpp</a></div></div>
<div class="ttc" id="asession__server__impl_8hpp_html_ac0975eaa72bec0cc17ccbf062e6785a1"><div class="ttname"><a href="session__server__impl_8hpp.html#ac0975eaa72bec0cc17ccbf062e6785a1">TEMPLATE_SESSION_SERVER_IMPL</a></div><div class="ttdeci">#define TEMPLATE_SESSION_SERVER_IMPL</div><div class="ttdoc">Internally used macro; public API users should disregard (same deal as in struc/channel....</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00430">session_server_impl.hpp:430</a></div></div>
<div class="ttc" id="asession__server__impl_8hpp_html_afb6afd5f56bebcabd155f3c1def7f180"><div class="ttname"><a href="session__server__impl_8hpp.html#afb6afd5f56bebcabd155f3c1def7f180">CLASS_SESSION_SERVER_IMPL</a></div><div class="ttdeci">#define CLASS_SESSION_SERVER_IMPL</div><div class="ttdoc">Internally used macro; public API users should disregard (same deal as in struc/channel....</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00433">session_server_impl.hpp:433</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1App_html_a78bb1e984835f429fd44869a83f4b093"><div class="ttname"><a href="structipc_1_1session_1_1App.html#a78bb1e984835f429fd44869a83f4b093">ipc::session::App::m_group_id</a></div><div class="ttdeci">util::group_id_t m_group_id</div><div class="ttdoc">The application must run as this group ID (GID). Files and other shared resources shall have this own...</div><div class="ttdef"><b>Definition:</b> <a href="app_8hpp_source.html#l00171">app.hpp:171</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1App_html_a8e67b57829fe43a122a23c699b5de8fd"><div class="ttname"><a href="structipc_1_1session_1_1App.html#a8e67b57829fe43a122a23c699b5de8fd">ipc::session::App::m_name</a></div><div class="ttdeci">std::string m_name</div><div class="ttdoc">Brief application name, readable to humans and unique across all other applications' names; used both...</div><div class="ttdef"><b>Definition:</b> <a href="app_8hpp_source.html#l00144">app.hpp:144</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1App_html_a9e32297579603f2d96616976474d0246"><div class="ttname"><a href="structipc_1_1session_1_1App.html#a9e32297579603f2d96616976474d0246">ipc::session::App::m_user_id</a></div><div class="ttdeci">util::user_id_t m_user_id</div><div class="ttdoc">The application must run as this user ID (UID). Files and other shared resources shall have this owne...</div><div class="ttdef"><b>Definition:</b> <a href="app_8hpp_source.html#l00168">app.hpp:168</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Client__app_html"><div class="ttname"><a href="structipc_1_1session_1_1Client__app.html">ipc::session::Client_app</a></div><div class="ttdoc">An App that is used as a client in at least one client-server IPC split.</div><div class="ttdef"><b>Definition:</b> <a href="app_8hpp_source.html#l00184">app.hpp:185</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Client__app_html_add718cbf6aa1d2abb26fbadcc974a7bd"><div class="ttname"><a href="structipc_1_1session_1_1Client__app.html#add718cbf6aa1d2abb26fbadcc974a7bd">ipc::session::Client_app::Master_set</a></div><div class="ttdeci">boost::unordered_map&lt; std::string, Client_app &gt; Master_set</div><div class="ttdoc">Suggested type for storing master repository or all Client_appss. See App doc header for discussion.</div><div class="ttdef"><b>Definition:</b> <a href="app_8hpp_source.html#l00192">app.hpp:192</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Server__app_html"><div class="ttname"><a href="structipc_1_1session_1_1Server__app.html">ipc::session::Server_app</a></div><div class="ttdoc">An App that is used as a server in at least one client-server IPC split.</div><div class="ttdef"><b>Definition:</b> <a href="app_8hpp_source.html#l00205">app.hpp:206</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Server__app_html_abdcd9e8b0287f914496d45a99848be44"><div class="ttname"><a href="structipc_1_1session_1_1Server__app.html#abdcd9e8b0287f914496d45a99848be44">ipc::session::Server_app::m_permissions_level_for_client_apps</a></div><div class="ttdeci">util::Permissions_level m_permissions_level_for_client_apps</div><div class="ttdoc">Specifies level of access for Client_apps (which must, also, be in m_allowed_client_apps at any rate)...</div><div class="ttdef"><b>Definition:</b> <a href="app_8hpp_source.html#l00288">app.hpp:288</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Session__server__impl_1_1State_html"><div class="ttname"><a href="structipc_1_1session_1_1Session__server__impl_1_1State.html">ipc::session::Session_server_impl::State</a></div><div class="ttdoc">All internal mutable state of Session_server_impl.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00359">session_server_impl.hpp:360</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Session__server__impl_1_1State_html_a76d6d531e2bb8e82992a35959357b16d"><div class="ttname"><a href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a76d6d531e2bb8e82992a35959357b16d">ipc::session::Session_server_impl::State::m_last_cli_namespace</a></div><div class="ttdeci">std::atomic&lt; uint64_t &gt; m_last_cli_namespace</div><div class="ttdoc">The ID used in generating the last Server_session::cli_namespace(); so the next one = this plus 1....</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00362">session_server_impl.hpp:362</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Session__server__impl_1_1State_html_a7d717bece2122ff619496717b5da7b68"><div class="ttname"><a href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a7d717bece2122ff619496717b5da7b68">ipc::session::Session_server_impl::State::m_master_sock_acceptor</a></div><div class="ttdeci">boost::movelib::unique_ptr&lt; transport::Native_socket_stream_acceptor &gt; m_master_sock_acceptor</div><div class="ttdoc">transport::Native_socket_stream acceptor avail throughout *this to accept init please-open-session re...</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00395">session_server_impl.hpp:395</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Session__server__impl_1_1State_html_a96b5d124c1a31532a38a0f0cd095ec05"><div class="ttname"><a href="structipc_1_1session_1_1Session__server__impl_1_1State.html#a96b5d124c1a31532a38a0f0cd095ec05">ipc::session::Session_server_impl::State::m_mutex</a></div><div class="ttdeci">Mutex m_mutex</div><div class="ttdoc">Protects m_incomplete_sessions. See class doc header impl section for discussion of thread design.</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00398">session_server_impl.hpp:398</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Session__server__impl_1_1State_html_ab6097ff11f1f8cca396ece86482861f4"><div class="ttname"><a href="structipc_1_1session_1_1Session__server__impl_1_1State.html#ab6097ff11f1f8cca396ece86482861f4">ipc::session::Session_server_impl::State::m_incomplete_sessions</a></div><div class="ttdeci">Incomplete_sessions m_incomplete_sessions</div><div class="ttdoc">The set of all Incomplete_session objects such that each one comes from a distinct async_accept() req...</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00392">session_server_impl.hpp:392</a></div></div>
<div class="ttc" id="astructipc_1_1session_1_1Session__server__impl_1_1State_html_afea14f96bce70093ebf65d0f9b612b29"><div class="ttname"><a href="structipc_1_1session_1_1Session__server__impl_1_1State.html#afea14f96bce70093ebf65d0f9b612b29">ipc::session::Session_server_impl::State::m_incomplete_session_graveyard</a></div><div class="ttdeci">boost::movelib::unique_ptr&lt; flow::async::Single_thread_task_loop &gt; m_incomplete_session_graveyard</div><div class="ttdoc">Mostly-idle thread that solely destroys objects removed from m_incomplete_sessions in the case where ...</div><div class="ttdef"><b>Definition:</b> <a href="session__server__impl_8hpp_source.html#l00404">session_server_impl.hpp:404</a></div></div>
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